Quinoline sulfide derivatives

ABSTRACT

The present invention is directed to quinoline sulfide derivatives with antibacterial activities selectively against Hp, obtained by reacting quinoline-4(1H)-thione derivatives with halides and represented by the formula I ##STR1## wherein R 1  represents hydrogen or halogen atom, C 1  -C 6  alkoxy, C 1  -C 6  alkylthio or di C 1  -C 6  alkylamino; R 2  and R 3  respectively represent hydrogen atom or C 1  -C 6  alkyl; one of R 4  and R 5  represents hydroxyl group and the other represents hydrogen atom or CR 4  R 5  represents carbonyl; and m and n are integers, m being 1 or 2, n being 0 or 1.

TECHNICAL FIELD

The present invention relates to novel quinoline sulfide derivatives represented by the formula I and having antibacterial activity against Helicobacter pylori or pharmaceutically acceptable salts thereof and antibacterial agents comprising quinoline sulfide derivatives as effective components: ##STR2## wherein R₁ represents hydrogen or halogen atom, C₁ -C₆ alkoxy, C₁ -C₆ alkylthio or di C₁ -C₆ alkylamino; R₂ and R₃ respectively represent hydrogen atom or C₁ -C₆ alkyl; one of R₄ and R₅ represents hydroxyl group and the other represents hydrogen atom or CR₄ R₅ represents carbonyl; m and n are integers, m being 1 or 2, n being 0 or 1; Ar represents, in a case where n is 0, a group of the formula II or III ##STR3## wherein R₆ represents hydrogen atom, C₁ -C₆ alkyl or di C₁ -C₆ alkylamino; R₇ represents hydrogen atom, C₁ -C₉ alkyl, hydroxy C₁ -C₆ alkyl, napthoyl C₁ -C₆ alkyl, acetoxy C₁ -C₆ alkyl, C₁ -C₆ alkoxycarbonyl, trihalo C₁ -C₆ alkoxycarbonyl, di C₁ -C₆ alkylaminoacetyl or di C₁ -C₆ alkylamino C₁ -C₆ alkyl; R₈ represents hydrogen atom, C₁ -C₆ alkyl, hydroxy C₁ -C₆ alkyl or acetoxy C₁ -C₆ alkyl, or NR₇ R₈ represents pyrrolidinyl, piperidino, morpholino or piperazinyl (which may be substituted by C₁ -C₆ alkyl or formyl); R₉ represents benzyl; and t is an integer and is 0 or 1;

Ar represents, in a case where n is 1, naphthyl, fluorenyl or a group of the formula IV, V or VI ##STR4## wherein R₁₀ represents hydrogen atom, C₁ -C₆ alkyl, hydroxyl group, C₁ -C₆ alkoxy, epoxy C₁ -C₆ alkoxy, mono- or dihydroxy C₁ -C₆ alkoxy, phenyl, piperidinyl (which may be substituted by C₁ -C₆ alkylcarbonyl or C₁ -C₆ alkoxycarbonyl), or tetrahydropyridyl (which may be substituted by C₁ -C₆ alkylcarbonyl); R₁₁ represents hydrogen atom, C₁ -C₆ alkoxy or benzyloxy; R₁₂ represents hydrogen atom or C₁ -C₆ alkoxy; R₁₃ represents hydrogen atom or C₁ -C₆ alkoxy; R₁₄ represents C₁ -C₆ alkoxycarbonyl, phenyl (which may be substituted by C₁ -C₆ alkoxy), or benzoyl (which may be substituted by C₁ -C₆ alkyl); R₁₅ represents hydrogen or halogen atom; R₁₆ represents hydrogen atom, C₁ -C₆ alkyl, C₁ -C₆ alkylcarbonyl, C₁ -C₆ alkoxycarbonyl or pyrrolidinyl (which may be substituted by C₁ -C₆ alkoxycarbonyl); R₁₇ represents hydrogen atom, C₁ -C₉ alkyl or benzyl, or NR₁₆ R₁₇ represents piperidino, morpholino, piperazinyl (which may be substituted by C₁ -C₆ alkyl, C₁ -C₆ alkylcarbonyl, C₁ -C₆ alkoxycarbonyl, trihalo C₁ -C₆ alkoxycarbonyl, C₂ -C₆ alkenyloxycarbonyl, phenoxycarbonyl, benzyloxycarbonyl, amino C₁ -C₆ alkylcarbonyl (amino group may be substituted by C₁ -C₆ alkoxycarbonyl), cinnamoyl (which may be substituted by C₁ -C₆ alkoxy), C₁ -C₆ alkylcarbamoyl, di C₁ -C₆ alkylsulfamoyl, C₁ -C₆ alkylsulfonyl, di C₁ -C₆ alkylaminothiocarbonyl, pyrimidyl or phenyl (which may be substituted by halogen atom)), imidazolidinyl (which may be substituted by oxo or C₁ -C₆ alkyl) or homopiperazinyl (which may be substituted by C₁ -C₆ alkoxycarbonyl); p is an integer within a range of 0-5 and r is an integer within a range of 0-2; there is no case where all of R₁, R₂, R₃, R₁₀, R₁₁ and R₁₂ are hydrogen atoms when m and n are respectively 1, CR₄ R₅ is carbonyl and Ar is the group of the formula IV; R₁ is not hydrogen or halogen atom nor C₁ -C₆ alkoxy when m is 1, n is 0 and Ar is 4-aminophenyl.

BACKGROUND ART

Helicobacter pylori is a spiral, short rod-shaped, gram-negative bacterium having monopolar and several sheathed flagella. The bacteria are detected both in the gastric mucous layer and on the surface of gastric epithelial cells.

The fact that spiral bacteria live on and in a gastric mucosa has been observed by many researchers. Firstly in 1983, Marshall et al. succeeded in cultivating spiral bacteria through isolation of the same from a gastric mucosa. The bacterium was originally named Campylobacter pylori since its shapes and biochemical characteristics are analogous to those of the genus Campylobacter which is one of known enteritis-causing bacterial genera. However, later bacterial taxonomic researches established a new independent genus including the bacterium, and the bacterium was renamed Helicobacter pylori. In 1984, Marshall et al. detected the bacteria at high percentage from patients suffering from peptic ulcer such as gastric and duodenal ulcers and chronic gastritis, and suggested relevance of the bacteria to occurrence and recurrence of these diseases. As conventional remedies against peptic ulcer, medical treatments with gastric secretion inhibitors have been utilized; advent of H₂ -blocker such as cimetidine and proton-pump inhibitor such as omeprazole enhanced the cure rate up to 80-90%. However, it has been reported that about 50% of patients healed with administration of anti-ulcer agents have relapse or recurrence of ulcers within twelve months and that, particularly, patients healed with gastric secretion inhibitors such as H₂ -blockers and proton-pump inhibitors have relapse rate of as high as 70-90%. Thus, prevention of the relapse or recurrence is one of greatest problems in the treatment.

There have, however, been recently increasingly reported that removal of Helicobacter pylon (hereinafter referred to as Hp) with an antibacterial agent will decrease ulcer relapse rate [see for example SAISHIN-IGAKU: Vol. 44, No. 2, pp. 295-302, (1989)]; and, in February 1994, NIH in U. S. A. advised necessity of eradicating Hp in the treatment of peptic ulcer. Hp-eradication agents used nowadays are for example antibiotics and bismuth preparations. Antibiotics are not suitable for long-term use since they may also affect other intestinal bacteria and may cause advent of resistant bacteria. Treatment with bismuth preparations is rather problematic since the bismuth preparations are weak in antibacterial activity and may cause vomiting, diarrhea and/or side effects on central nervous system.

Anti-ulcer agents with antibacterial activities against Hp have been proposed for example in Japanese Patent Provisional Publication (Kokai) Nos. 4-364160 and 5-117268; however, none of the proposed agents have sufficient selectivity and antibacterial activity. Under such circumstances, there have been demand on development of preparations having higher selectivity on Hp as well as having higher antibacterial activity against Hp in the treatment of peptic ulcer and chronic gastritis with Hp infection.

Recently, quinoline-4(1H)-thione derivatives were found to have antibacterial activity selectively against Hp and have been suggested as antibacterial agents against Hp (WO 96/11187). However, there has been still room for inprovement in strength of antibacterial activity.

In order to overcome the above-mentioned problems, we, the inventors carried out intensive studies to find that quinoline sulfide derivatives of the above-mentioned formula I which are obtained by modifying thione functional group of quinoline-4(1H)-thione derivatives have antibacterial activity selectively against Hp and superior to that of the above-mentioned quinoline-4(1H)-thione derivatives, thus accomplishing the present invention.

Known quinoline sulfide derivatives similar to the compounds of the present invention are benzyl sulfide derivatives of quinoline disclosed in Japanese Patent Provisional publication (Kokai) No. 1-246264 and U.S. Pat. No. 5,296,484; disclosed in them is bactericidal effect against botanically pathogenic bacteria or acari- or insecticidal effect. Analogical derivatives are also disclosed in Synthesis (1): 56 (1995). However, no reports have been made on antibacterial effect of these quinoline sulfide derivatives against Hp at all. Provision of quinoline sulfide derivatives as antibacterial agent against Hp is originally proposed in the present application.

DISCLOSURE OF THE INVENTION

The terms used for definition of letters in the formula I by which the compounds of the present invention are represented are defined and exemplified in the following.

The wording "C₁ -C₆ " refers to a group having 1 to 6 carbon atoms.

The wording "C₁ -C₉ " refers to a group having 1 to 9 carbon atoms.

The "C₁ -C₆ alkyl" refers to a straight- or branched-chain alkyl group such as methyl, ethyl, n-propyl, isopropyl, n-butyl, tert-butyl, n-pentyl, n-hexyl or the like.

The "C₁ -C₉ alkyl" refers to a straight- or branched-chain alkyl group such as heptyl, octyl, nonyl or the like in addition to the groups referred to in the above with reference to "C₁ -C₆ alkyl".

The "C₁ -C₆ alkoxy" refers to a straight- or branched-chain alkoxy group such as methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, tert-butoxy, n-pentyloxy, n-hexyloxy or the like.

The "C₂ -C₆ alkenyl" refers to a straight- or branched-chain alkenyl group such as vinyl, propenyl, isopropenyl, butenyl, pentenyl, hexenyl or the like.

The "halogen atom" may be fluorine, chlorine, bromine or iodine atom.

The compounds according to the present invention may be as follows, though the present invention is not limited to these compounds.

4-[2-(4-tert-Butylphenyl)-2-oxoethylthio]quinoline

4-[2-(4-Hydroxyphenyl)-2-oxoethylthio]quinoline

4-[1,1-Dimethyl-2-(4-methoxyphenyl)-2-oxoethylthio]-quinoline

4-[2-(4-Benzyloxyphenyl)-2-oxoethylthio]-7-methoxyquinoline

4-[2-(4-Benzyloxyphenyl)-2-oxoethylthio]quinoline

4-[2-[4-(4-Methoxybenzyloxy)phenyl]-2-oxoethylthio]-quinoline

4-[2-(3-Benzyloxyphenyl)-2-oxoethylthio]quinoline

4-[2-[4-[2-(4-tert-Butylphenyl)-2-oxoethoxy]phenyl]-2-oxoethylthio]quinoline

4-[2-(4-Phenoxyphenyl)-2-oxoethylthio]quinoline

4-[2-[4-(4-Methoxyphenoxy)phenyl]-2-oxoethylthio]quinoline

4-[2-(4-Hydroxy-2-methoxyphenyl)-2-oxoethylthio]quinoline

4-[2-(2,4-Dimethoxyphenyl)-2-oxoethylthio]quinoline

4-[2-[2-Methoxy-4-(4-methoxybenzyloxy)phenyl]-2-oxoethylthio]quinoline

4-[2-[3-Methoxy-4-(4-methoxybenzyloxy)phenyl]-2-oxoethylthio]quinoline

4-[2-[3-Methoxy-4-(2,3-epoxypropoxy)phenyl]-2-oxoethylthio]quinoline

4-[2-[3-Methoxy-4-(2,3-dihydroxypropoxy)phenyl]-2-oxoethylthio]quinoline

4-[2-(2-Methoxy-4-hexyloxyphenyl)-2-oxoethylthio]-quinoline

4-[2-[4-(5-Ethoxycarbonyl-n-pentyloxy)phenyl]-2-oxoethylthio]quinoline

4-[2-(2,3,4-Trimethoxyphenyl)-2-oxoethylthio]quinoline

4-[2-(3,4,5-Trimethoxyphenyl)-2-oxoethylthio]quinoline

4-[2-(4-tert-Butoxycarbonylaminophenyl)-2-oxoethylthio]quinoline

4-[2-(4-Pivaloylaminophenyl)-2-oxoethylthio]quinoline

4-[2-[4-(N-Acetylbenzylamino)phenyl]-2-oxoethylthio]quinoline

4-[2-(4-Benzylaminophenyl)-2-oxoethylthio]quinoline

4-[2-(4-Benzylamino-3-bromophenyl)-2-oxoethylthio]-quinoline

4-[2-(4-Dimethylaminophenyl)-2-oxoethylthio]quinoline

4-[2-[3-Bromo-4-(1-tert-butoxycarbonyl-3-pyrrolidinylamino)phenyl]-2-oxoethylthio]quinoline

4-[2-[4-(3-Isobutyl-5-oxo-1-imidazolidinyl)phenyl]-2-oxoethylthio]quinoline

4-[2-(4-Piperidinophenyl)-2-oxoethylthio]quinoline

4-[2-(4-Morpholinophenyl)-2-oxoethylthio]quinoline

4-[2-(3-Bromo-4-morpholinophenyl)-2-oxoethylthio]-quinoline

4-[2-[4-(4-tert-Butoxycarbonyl-1-piperazinyl)phenyl]-2-oxoethylthio]quinoline

4-[2-[4-[2-(4-tert-Butoxycarbonyl-1-piperazinyl)ethyl]-phenyl]-2-oxoethylthio]quinoline

4-[2-[4-(4-Acetyl-1-piperazinyl)phenyl]-2-oxoethylthio]-quinoline

4-[2-[3-Bromo-4-(4-tert-butoxycarbonyl-1-piperazinyl)-phenyl]-2-oxoethylthio]quinoline

4-[2-[4-(4-Pivaloyl-1-piperazinyl)phenyl]-2-oxoethylthio]quinoline

4-[2-[4-[4-(4-Methoxycinnamoyl)-1-piperazinyl]phenyl]-2-oxoethylthio]quinoline

4-[2-[4-(4-Diethylaminothiocarbonyl-1-piperazinyl)-phenyl]-2-oxoethylthio]quinoline

4-[2-[4-(4-Methyl-1-piperazinyl)phenyl]-2-oxoethylthio]-quinoline

4-[2-[4-(4-Isobutyl-1-piperazinyl)phenyl]-2-oxoethylthio]quinoline

4-[2-[3-Bromo-4-(4-neopentyl-1-piperazinyl)phenyl]-2-oxoethylthio]quinoline

4-[2-[4-[4-(4-Bromophenyl)-1-piperazinyl]phenyl]-2-oxoethylthio]quinoline

4-[2-[4-[4-(2-Pyrimidyl)-1-piperazinyl]phenyl]-2-oxoethylthio]quinoline

4-[2-[4-(4-tert-Butoxycarbonyl-1-piperazinyl)phenyl]-2-oxoethylthio]-6-fluoroquinoline

4-[2-[4-(4-Benzyloxycarbonyl-1-piperazinyl)phenyl]-2-oxoethylthio]quinoline

4-[2-[4-(4-Vinyloxycarbonyl-1-piperazinyl)phenyl]-2-oxoethylthio]quinoline

4-[2-[4-[4-(N-tert-Butoxycarbonylvalyl)-1-piperazinyl]-phenyl]-2-oxoethylthio]quinoline

4-[2-[4-(4-Phenoxycarbonyl-1-piperazinyl)phenyl]-2-oxoethylthio]quinoline

4-[2-[4-[4-(2,2,2-Trichloroethoxycarbonyl)-1-piperazinyl]phenyl]-2-oxoethylthio]quinoline

4-[2-[4-(4-Isobutoxycarbonyl-1-piperazinyl)phenyl]-2-oxoethylthio]quinoline

4-[2-[4-(4-Ethoxycarbonyl-1-piperazinyl)phenyl]-2-oxoethylthio]quinoline

4-[2-[4-(4-Allyloxycarbonyl-1-piperazinyl)phenyl]-2-oxoethylthio]quinoline

4-[2-[4-(4-Methoxycarbonyl-1-piperazinyl)phenyl]-2-oxoethylthio]quinoline

4-[2-[4-(4-Dimethylsulfamoyl-1-piperazinyl)phenyl]-2-oxoethylthio]quinoline

4-[2-[4-[4-(N-tert-Butylcarbamoyl)-1-piperazinyl]phenyl]-2-oxoethylthio]quinoline

4-[2-[4-(4-Methanesulfonyl-1-piperazinyl)phenyl]-2-oxoethylthio]quinoline

4-[2-[4-(4-tert-Butoxycarbonyl-1-piperazinyl)phenyl]-2-hydroxyethylthio]quinoline

4-[2-[4-(1-Piperazinyl)phenyl]-2-oxoethylthio]quinoline hydrochloride

4-[2-(p-Biphenyl)-2-oxoethylthio]-7-methoxyquinoline

4-[2-(p-Biphenyl)-2-oxoethylthio]quinoline

4-[2-(2-Naphtyl)-2-oxoethylthio]quinoline

4-[2-(2-Naphtyl)-2-oxoethylthio]-7-methylthioquinoline

4-[2-(2-Naphtyl)-2-hydroxyethylthio]quinoline

4-[2-(1-Naphtyl)-2-oxoethylthio]quinoline

4-[2-(2-Fluorenyl)-2-oxoethylthio]-7-methoxyquinoline

4-[2-[4-(1-Pivaloyl-4-piperidinyl)phenyl]-2-oxoethyl-thio]quinoline

4-[2-[4-(4-tert-Butoxycarbonyl-1-homopiperazinyl)phenyl]-2-oxoethylthio]quinoline

4-[3-(4-Methoxyphenyl)-3-oxopropylthio]quinoline

4-[3-(4-Acetoaminophenyl)-3-oxopropylthio]quinoline

4-[2-[4-(Heptylamino)phenyl]-2-oxoethylthio]quinoline

4-[2-[4-(Butylamino)-3-bromophenyl]-2-oxoethylthio]-quinoline

4-[2-(4-(Diethylamino)phenyl]-2-oxoethylthio]quinoline

4-[2-(4-Isopropylphenyl)-2-oxoethylthio]quinoline

4-[2-[4-(1-Pivaloyl-1,2,5,6-tetrahydropyrid-4-yl)-phenyl]-2-oxoethylthio]quinoline

4-[2-[4-(1-tert-Butoxycarbonyl-4-piperidinyl)phenyl]-2-oxoethylthio]quinoline

4-(4-Aminobenzylthio)-7-methylthioquinoline

4-(4-Ethylaminobenzylthio)-7-methythioquinoline

4-(4-Isobutylaminobenzylthio)-7-methoxyquinoline

4-[4-(4-Hydroxybutylamino)benzylthio]-7-methylthioquinoline

4-[4-(3,5,5-Trimethylhexylamino)benzylthiol-7-methylthioquinoline

4-[1-[4-(2,2,2-Trichloroethoxy)carbonylaminophenyl]-ethylthio]-7-methylthioquinoline

4-[4-(2-β-Naphtyl-2-oxoethylamino)benzylthio]-7-methylthioquinoline

4-(3-Methyl-4-methylaminobenzylthio)-7-methylthioquinoline

4-(3-Methyl-4-dimethylaminobenzylthio)-7-methylthioquinoline

4-[3,4-Bis(dimethylamino)benzylthio]-7-methylthioquinoline

4-(4-Dimethylaminobenzylthio)quinoline

4-(4-Dimethylaminobenzylthio)-7-methylthioquinoline

4-(4-Dimethylaminobenzylthio)-7-isopropylthioquinoline

4-(4-Dimethylaminobenzylthio)-7-dimethylaminoquinoline

4-[1-(4-Dimethylaminophenyl)ethylthio]-7-methylthioquinoline

4-(4-Diethylaminobenzylthio)-7-methylthioquinoline

4-[4-(1-Pyrrolidinyl)benzylthio]-7-methylthioquinoline

4-(4-Morpholinobenzylthio)-7-methylthioquinoline

4-(4-Piperidinobenzylthio)-7-methylthioquinoline

4-[4-(4-Methyl-1-piperazinyl)benzylthio]-7-methylthioquinoline

4-[4-(4-Neopentyl-1-piperazinyl)benzylthio]-7-methylthioquinoline

4-[4-(4-Formyl-1-piperazinyl)benzylthio]-7-methylthioquinoline

4-[4-(4-Formyl-1-piperazinylmethyl)benzylthio]quinoline

4-[4-(4-Formyl-1-piperazinylmethyl)benzylthio]-7-methylthioquinoline

4-[4-[Bis(2-acetoxyethyl)amino]benzylthio]-7-methylthioquinoline

4-[4-[N-(2-Acetoxyethyl)-2-hydroxyethylamino]benzylthio]-7-methylthioquinoline

4-[4-[Bis(2-hydroxyethyl)amino]benzylthio]-7-methylthioquinoline

4-[2-(4-tert-Butoxycarbonylaminophenyl)ethylthio]-quinoline

4-[2-(4-Aminophenyl)ethylthio]-7-methoxyquinoline

4-[2-(4-Benzyloxyphenyl)ethylthio]quinoline

4-[2-(4-Dimethylaminophenyl)ethylthio]quinoline

4-[2-[4-[2-(N-Isobutyl-N-methylamino)acetylamino]phenyl]-ethylthio]quinoline

4-[2-[4-(3-Isobutyl-5-oxo-1-imidazolidinyl)phenyl]ethylthio]quinoline

4-[2-[4-[N-[2-(N-Isobutyl-N-methylamino)ethyl]-N-methylamino]phenyl]ethylthio]quinoline

The compounds of the present invention may have asymmetric carbon atoms in their structures. It is to be understood that isomers due to such asymmetric carbon atoms or combination (racemic form) of any of the isomers are included in the category of the compounds of the present invention.

Furthermore, the compounds of the present invention may be in the form of pharmaceutically acceptable salts such as acid added salt, alkali salts or organic ammonium salts. The appropriate acid added salts which can be used include, for example, inorganic acid salts such as hydrochloride, sulfate, hydrobromide, nitrate and phosphate, organic acid salts such as acetate, oxalate, propionate, glycolate, lactate, pyruvate, malonate, succinate, maleate, fumarate, malate, tartrate, citrate, benzoate, cinnamate, methanesulfonic acid salt, benzenesulfonic acid salt, p-toluenesulfonic acid salt or salicylic acid salt. The appropriate alkali or organic ammonium salts which can be used include, for example, potassium salt, sodium salt, calcium salt, magnesium salt, barium salt or ammonium salt.

PREPARATION EXAMPLE

The compounds of the present invention may be prepared by the following procedure.

The compounds of the present invention with the formula I may be prepared by reacting quinoline-4(1H)-thione derivatives (the formula VII) with halide (the formula VIII) as shown in the following reaction formula. In this reaction, base may be employed as needs demands. Such base may include potassium carbonate, sodium hydroxide, sodium hydride, barium oxide, triethylamine or the like. Reaction solvent which can be used include DMSO, DMF, THF, acetone, ether or the like. Reaction time may be selected according to a reaction temperature range of -10° C. to boiling point of the solvent, and usually be 0.5-20 hours under the reaction temperature range of 0-50° C. ##STR5## wherein X represents clorine or bromine atom and R₁, R₂, R₃, R₄, R₅, Ar, m and n are as defined above.

The compounds of the present invention thus obtained may be used as starting materials to prepare corresponding derivatives through alkylation, acylation, hydrolysis, reduction or the like according to the prior art.

The compounds of the present invention thus obtained may be separated and purified by a usual manner such as extraction, condensation, neutralization, filtration, recrystallization or column chromatography, if necessary.

Pharmaceutically acceptable salts of the compounds of the present invention may be prepared by various known methods in the art.

The compounds of the formula VII which are the starting materials in the above-mentioned process are known compounds the preparation of which is disclosed in WO 96/11187. The compounds of the formula VIII are commercially available and alternatively can be readily synthesized according to a process described for example in Chem. Pharm. Bull. 39: 1751 (1991), J. Org. Chem. 27: 4397 (1962), 29: 3459 (1964) and 40: 1990 (1975), Org. Syn. Coll. 6: 711, Reagents for Organic Synthesis 1: 967.

Next, described is antibacterial activity of the compound of the present invention represented by the formula I. The numbers of test compounds in Antibacterial Tests 1 and 2 correspond to those in Examples referred to hereinafter. Controls used were antibiotic (amoxicillin and clarithromycin) and anti-ulcer agent (lansoprazole) having antibacterial activity against Hp.

Antibacterial Test 1

Antibacterial test against Hp was performed in substantial accordance with agar plate dilution method (anaerobic MIC method) based on standard method of the Japan Society of Chemotherapy to determine minimum inhibitory concentration (MIC) of the respective test compounds.

[Preparation of Medium for Sensitivity Testing]

The respective test compounds were dissolved in dimethyl sulfoxide (DMSO) and serially diluted twofold to prepare diluted solutions of the compounds with concentration of 0.000025-100 μg/ml. The solutions of the compounds are respectively added to brucella agar medium (prepared by Difco) containing 7% horse blood free from fibrin (prepared by NIPPON BIOTEST KENKYUSHO) to prepare agar plates for determination.

[Preparation of Inocula]

Strain used for inoculation was Helicobacter pylori standard strain ATCC 43526 (NCTC 11916). For pre-culturing of bacteria to be inoculated, the above-mentioned strain freezingly conserved at -135° C. was thawed in a warm bath (40° C.), applied on a brucella agar medium containing 7% horse blood free from fibrin, and microaerobically cultured in a jar for anaerobic bacteria at 37° C. for 3 days. The suspension of bacteria to be inoculated was prepared by collecting colonies grown on the culture medium and suspending the same in the brucella broth.

The suspension was made such that the concentration of the bacteria to be inoculated provides absorbancy O.D_(570nm) =0.50, and 2.0×10⁷ CFU/ml of the suspension of the bacteria was prepared, then 5 μl of which was inoculated with multi-inoculator (manufactured by SAKUMA SEISAKUSHO). Culturing was performed for 3 days under the same conditions as those of the pre-culturing and the MIC (unit: μg/ml) was determined by observing whether the bacteria grew or not. The obtained results are shown in Table 1.

                                      TABLE 1                                      __________________________________________________________________________     Test    MIC  Test    MIC  Test    MIC                                            Compound (μg/ml) Compound (μg/ml) Compound (μg/ml)                  __________________________________________________________________________     Compound 1                                                                             0.05 Compound 36                                                                            0.10 Compound 66                                                                            0.0004                                         Compound 2 0.20 Compound 37 0.20 Compound 67 0.0062                            Compound 4 0.10 Compound 38 0.20 Compound 68 0.0016                            Compound 5 0.025 Compound 39 0.10 Compound 69 0.025                            Compound 6 0.05 Compound 40 0.20 Compound 70 0.05                              Compound 10 0.0031 Compound 41 0.20 Compound 71 0.05                           Compound 11 0.0125 Compound 43 0.10 Compound 72 0.05                           Compound 14 0.0016 Compound 44 0.20 Compound 73 0.0062                         Compound 15 0.10 Compound 45 0.20 Compound 74 0.0008                           Compound 17 0.05 Compound 46 0.10 Compound 75 0.0125                           Compound 19 0.10 Compound 47 0.20 Compound 76 0.0062                           Compound 20 0.025 Compound 48 0.10 Compound 78 0.0031                          Compound 22 0.0062 Compound 49 0.0008 Compound 79 0.0016                       Compound 23 0.025 Compound 50 0.05 Compound 81 0.0016                          Compound 24 0.20 Compound 51 0.20 Compound 82 0.0008                           Compound 25 0.10 Compound 52 0.0008 Compound 83 0.0008                         Compound 26 0.10 Compound 53 0.025 Compound 84 0.0016                          Compound 27 0.10 Compound 54 0.0016 Compound 85 0.0031                         Compound 28 0.0008 Compound 55 0.0062 Compound 86 0.0031                       Compound 29 0.0008 Compound 56 0.0125 Compound 87 0.0008                       Compound 30 0.10 Compound 57 0.39 clarithromycin 0.025                         Compound 31 0.10 Compound 58 0.0031 amoxicillin 0.05                           Compound 33 0.20 Compound 61 0.20 lansoprazole 12.5                            Compound 34 0.20 Compound 63 0.10                                              Compound 35 0.39 Compound 65 0.0031                                          __________________________________________________________________________

As is clear from the above Table 1, the compounds of the present invention exhibit excellent antibacterial activities against Hp and some of them have activities superior to those of amoxicillin and clarithromycin. Structurally, the compounds of the formula I wherein m and n are respective 1, CR₄ R₅ is carbonyl, all of R₁, R₂ and R₃ are hydrogen atoms, and Ar is a group of the formula VI exhibited especially excellent activities.

Antibacterial Test 2

Then, tested were antibacterial activities of the typical compounds of the present invention against gram-positive and -negative bacteria other than Hp. MICs of the typical compounds of the present invention were determined in substantial accordance with agar dilution method (aerobic MIC method) based on standard method of the Japan Society Chemotherapy.

[Preparation of Medium for Sensitivity Testing]

The respective test compound were dissolved in dimethyl sulfoxide (DMSO) and serially diluted twofold to prepare solutions of the compounds with concentration of 0.05-100 μg/ml. The solutions of the compounds were respectively added to sensitive-disk agar medium-N (manufactured by NISSUI SEIYAKU) to prepare agar plates for determination.

[Preparation of Inocula]

Strains used for inoculation were 7 species as shown in Table 2. The below-mentioned strains freezingly conserved at -135° C. were thawed in a warm bath (40° C.), cultured in a sensitivity-determining bouillon at 37° C. for 18-20 hours, and then diluted with the above-mentioned medium to prepare about 1.0×10⁶ CFU/ml of bacterial suspension.

Inoculation was made by 5 μl by multi-inoculator (manufactured by SAKUMA SEISAKUSHO). Culturing was made under the same conditions as those of the pre-culturing and the MIC (unit: μg/ml) was determined by observing whether the bacteria grew or not. The obtained results are shown in Tables 2 to 6.

                  TABLE 2                                                          ______________________________________                                                     MIC (μg/ml)                                                     Strain        Compound 1                                                                               Compound 2 Compound 5                                  ______________________________________                                         S. aureus FDA 209P                                                                           >100      >100       >100                                          M. luteus ATCC 9341 >100 >100 >100                                             E. faecalis RIMD >100 >100 >100                                                3336001                                                                        B. subtilis PCI 219 >100 >100 >100                                             E. coli NIHJ JC-2 >100 >100 >100                                               K. pneumoniae PCI 602 >100 >100 >100                                           P. aeruginosa IFO 3445 >100 >100 >100                                        ______________________________________                                    

                  TABLE 3                                                          ______________________________________                                                     MIC (μg/ml)                                                                   Compound  Compound   Compound                                      Strain 10 11 22                                                              ______________________________________                                         S. aureus FDA 209P                                                                           >100      >100       >100                                          M. luteus ATCC 9341 >100 >100 >100                                             E. faecalis RIMD >100 >100 >100                                                3336001                                                                        B. subtilis PCI 219 >100 >100 >100                                             E. coli NIHJ JC-2 >100 >100 >100                                               K. pneumoniae PCI 602 >100 >100 >100                                           P. aeruginosa IFO 3445 >100 >100 >100                                        ______________________________________                                    

                  TABLE 4                                                          ______________________________________                                                     MIC (μg/ml)                                                                   Compound  Compound   Compound                                      Strain 23 26 27                                                              ______________________________________                                         S. aureus FDA 209P                                                                           >100      >100        50                                           M. luteus ATCC 9341 >100 >100 >100                                             E. faecalis RIMD >100 >100 >100                                                3336001                                                                        B. subtilis PCI 219 >100 >100 >100                                             E. coli NIHJ JC-2 >100 >100 >100                                               K. pneumoniae PCI 602 >100 >100 >100                                           P. aeruginosa IFO 3445 >100 >100 >100                                        ______________________________________                                    

                  TABLE 5                                                          ______________________________________                                                     MIC (μg/ml)                                                                   Compound  Compound   Compound                                      Strain 31 34 49                                                              ______________________________________                                         S. aureus FDA 209P                                                                           >100      >100       >100                                          M. luteus ATCC 9341 >100 >100 >100                                             E. faecalis RIMD >100 >100 >100                                                3336001                                                                        B. subtilis PCI 219 >100 >100 >100                                             E. coli NIHJ JC-2 >100 >100 >100                                               K. pneumoniae PCI 602 >100 >100 >100                                           P. aeruginosa IFO 3445 >100 >100 >100                                        ______________________________________                                    

                  TABLE 6                                                          ______________________________________                                                     MIC (μg/ml)                                                                              Clarithro-                                              Strain Amoxicillin mycin Lansoprazole                                        ______________________________________                                         S. aureus FDA 209P                                                                           0.10       0.10     >100                                           M. luteus ATCC 9341 ≦0.05 ≦0.05 >100                             E. faecalis RIMD 0.20 0.39 >100                                                3336001                                                                        B. subtilis PCI 219 0.20 0.20 >100                                             E. coli NIHJ JC-2 3.13 100 >100                                                K. pneumoniae PCI 602 50 6.25 >100                                             P. aeruginosa IFO 3445 >100 >100 >100                                        ______________________________________                                    

The antibacterial activities of the compounds 65, 67-70, 73-76, 78, 79, 81, 83-85 of the present invention were determined in the manner same as the above to find out that MIC of each of the above-mentioned seven strains is more than 100 μg/ml.

As is clear from the above test results, the typical compounds of the present invention hardly exhibit antibacterial activity against the above-mentioned seven gram-positive or -negative strains. This means that the compounds of the present invention has selective antibacterial activity against Hp.

Thus, the compounds of the present invention have selective and effective antibacterial activities against the genus Helicobacter represented by Hp and have no antibacterial activities against intestinal bacteria such as E. coli, hardly cause any fluctuation of intestinal bacterial flora which may be caused in the case of other antibacterial agents such as penicillin and cephalosporin and are less dangerous of causing side effects such as enteritis and pseudomembranous colitis based on microbial substitution. Moreover, the compounds of the present invention exhibit the antibacterial activity selectively against the genus Helicobacter, so that they are deemed to hardly cause resistance induction for other strains, which is frequently seen in the case of existing antibacterial agents such as β-lactams and macrolides, as well as cross-resistance with other antibacterial agents.

Therefore, the compounds of the present invention can be applied as selective antibacterial agent against Hp for the treatment and prevention of recurrence of peptic ulcer and chronic gastritis with Hp infection. The compounds of the present invention may be administered to human orally or parenterally. In oral administration, the compounds may be in the form of tablets, coated tablets, powders, granules, capsules, microcapsules, syrups and the like; and in parenteral administration, in the form of injections which may include soluble freeze-drying form, suppositories and the like. In the preparation of these forms, pharmaceutically acceptable diluent bases, binders, lubricants, disintegrators, suspensions, emulsifiers, antiseptics, stabilizers and dispersing agents, for example, lactose, sucrose, starch, dextrin, crystalline cellulose, kaolin, calcium carbonate, talc, magnesium stearate, distilled water and physiological saline solution may be used.

BEST MODE FOR CARRYING OUT THE INVENTION EXAMPLES

Next, Examples will be explained to detailedly disclose the present invention. However, it is to be noted that the present invention is not limited to the Examples.

Example 1

4-[2-(4-Benzyloxyphenyl)-2-oxoethylthio]quinoline (Compound 1)

Quinoline-4(1H)-thione (3.50 g, 21.9 mmol) and potassium carbonate (3.95 g, 28.5 mmol) were suspended in dry acetone(350 ml). 1-Benzyloxy-4-bromoacetylbenzene (8.00 g, 26.3 mmol) was gradually added to the suspension under ice cooling and stirred at room temperature overnight. The solvent was removed under reduced pressure. The residue was added with water, extracted with ethyl acetate, washed with saturated saline solution, and dried over anhydrous magnesium sulfate. The solvent was removed under reduced pressure. The residue was chromatographed by silica gel column chromatography (n-hexane:ethyl acetate=1:4) and recrystallized from ethyl acetate to obtain 5.43 g of the titled compound (64.4%) as yellow-white crystal.

Melting Point: 135.0-136.5° C.; MS m/z: 385 (M⁺); NMR(CDCl₃) δ: 4.53(2H, s), 5.13(2H, s), 7.06(2H, d, J=8.9 Hz), 7.3-7.5(6H, m), 7.59(1H, brt, J=7.2 Hz), 7.76(1H, brt, J=7.2 Hz), 8.02(2H, d, J=8.9 Hz), 8.17(2H, brt, J=8.6 Hz), 8.71(1H, d, J=5.0 Hz)

In accordance with the procedure of the Example 1, the following compounds were obtained from corresponding starting materials.

4-[2-(2-Naphtyl)-2-oxoethylthio]quinoline (Compound 2)

MS m/z: 329 (M⁺); NMR(CDCl₃) δ: 4.65(2H, s), 7.32(1H, d, J=5.0 Hz), 7.5-7.8(4H, m), 7.8-8.0(3H, m), 8.0-8.1(2H, m), 8.16(1H, dd, J=1.2, 8.4 Hz), 8.53(1H, brs), 8.72(1H, d, J=5.0 Hz)

4-[2-(2-Fluorenyl)-2-oxoethylthio]-7-methoxyquinoline (Compound 3)

MS m/z: 397 (M⁺); NMR(CDCl₃) δ: 3.96(3H, s), 3.99(2H, s), 4.62(2H, s), 7.2-7.25(2H, m), 7.4-7.5(3H, m), 7.6-7.7(1H, m), 7.8-8.0(2H, m), 8.09(2H, d, J=9.2 Hz), 8.20(1H, brs), 8.64(1H, d, J=5.0 Hz)

4-[2-(p-Biphenyl)-2-oxoethylthio]quinoline (Compound 4)

MS m/z: 355 (M⁺); NMR(CDCl₃) δ: 4.60(2H, s), 7.35(1H, d, J=5.0 Hz), 7.4-7.55(3H, m), 7.55-7.7(3H, m), 7.7-7.8(3H, m), 8.1-8.25(4H, m), 8.74(1H, d, J=5.0 Hz)

4-[2-(4-tert-Butylphenyl)-2-oxoethylthio]quinoline (Compound 5)

MS m/z: 335 (M⁺); NMR(CDCl₃) δ: 1.36(9H, s), 4.57(2H, s), 7.30(1H, d, J=5.0 Hz), 7.53(2H, d, J=8.6 Hz), 7.58(1H, ddd, J=1.3, 6.9, 8.3 Hz), 7.72(1H, ddd, J=1.3, 6.9, 8.3 Hz), 7.98(2H, d, J=8.9 Hz), 8.07(1H, dd, J=0.7, 8.6 Hz), 8.17(1H, dd, J=0.7, 8.3 Hz), 8.72(1H, d, J=5.0 Hz)

4-[2-(2,4-Dimethoxyphenyl)-2-oxoethylthio]quinoline (Compound 6)

MS m/z: 339 (M⁺); NMR(CDCl₃) δ: 3.87(3H, s), 3.98(3H, s), 4.55(2H, s), 6.50(1H, d, J=2.3 Hz), 6.57(1H, dd, J=2.3, 8.9 Hz), 7.28(1H, d, J=5.0 Hz), 7.53(1H, ddd, J=1.2, 7.0, 8.7 Hz), 7.70(1H, ddd, J=1.2, 6.9, 8.2 Hz), 7.91(1H, d, J=5.0 Hz), 8.05(1H, brd, J=8.6 Hz), 8.16(1H, dd, J=1.0, 8.6 Hz), 8.69(1H, d, J=5.0 Hz)

4-[2-[4-[2-(4-tert-Butylphenyl)-2-oxoethoxy]phenyl]-2-oxoethylthio]quinoline (Compound 7)

MS m/z: 469 (M⁺); NMR(CDCl₃) δ: 1.36(9H, s), 4.50(2H, s), 5.38(2H, s), 7.01(2H, d, J=8.9 Hz), 7.28(1H, d, J=4.6 Hz), 7.5-7.55(3H, m), 7.72(1H, ddd, J=1.3, 6.6, 8.3 Hz), 7.94(2H, d, J=8.6 Hz), 8.01(2H, d, J=8.9 Hz), 8.07(1H, brd, J=8.6 Hz), 8.16(1H, d, J=8.2 Hz), 8.72(1H, d, J=4.6 Hz)

4-[3-(4-Methoxyphenyl)-3-oxopropylthio]quinoline (Compound 8)

MS m/z: 323 (M⁺); NMR(CDCl₃) δ: 3.45(2H, brt, J=7.6 Hz), 3.57(2H, brt, J=7.2 Hz), 3.87(3H, s), 6.94(2H, d, J=8.9 Hz), 7.31(1H, d, J=5.0 Hz), 7.58(1H, brt, J=7.9 Hz), 7.76(1H, brt, J=8.3 Hz), 7.95(2H, d, J=8.9 Hz), 8.15(2H, m), 8.74(1H, d, J=5.0 Hz)

4-[2-(4-Phenoxyphenyl)-2-oxoethylthio]quinoline (Compound 9)

MS m/z: 371 (M⁺); NMR(CDCl₃) δ: 4.52(2H, s), 7.04(2H, d, J=8.9 Hz), 7.09(2H, d, J=7.6 Hz), 7.22(1H, brd, J=7.3 Hz), 7.33(1H, d, J=5.0 Hz), 7.42(2H, brt, J=7.9 Hz), 7.59(1H, brt, J=7.4 Hz), 7.75(1H, brt, J=7.3 Hz), 8.02(2H, d, J=8.9 Hz), 8.16(2H, brt, J=9.9 Hz), 8.72(1H, d, J=5.0 Hz)

4-[2-(3-Bromo-4-morpholinophenyl)-2-oxoethylthio]-quinoline (Compound 10)

MS m/z: 443 (M⁺); NMR(CDCl₃) δ: 3.19(4H, brt, J=4.6 Hz), 3.90(4H, brt, J=4.6 Hz), 4.52(2H, s), 7.07(11, d, J=8.6 Hz), 7.2-7.3(1H, m), 7.36(1H, d, J=4.6 Hz), 7.63(1H, brt, J=7.8 Hz), 7.79(1H, brt, J=7.8 Hz), 7.96(1H, dd, J=2.1, 8.6 Hz), 8.19(1H, brd, J=8.9 Hz), 8.23(1H, d, J=2.0 Hz), 8.72(1H, d, J=5.0 Hz)

4-[2-(4-Morpholinophenyl)-2-oxoethylthio]quinoline (Compound 11)

MS m/z: 364 (M⁺); NMR(CDCl₃) δ: 3.35(4H, brt, J=5.0 Hz), 3.87(4H, brt, J=5.0 Hz), 4.50(2H, s), 6.89(2H, d, J=8.9 Hz), 7.34(1H, d, J=5.0 Hz), 7.57(1H, ddd, J=1.3, 6.9, 8.3 Hz), 7.74(1H, ddd, J=1.3, 6.9, 8.6 Hz), 7.97(2H, d, J=8.9 Hz), 8.12(1H, brd, J=8.6 Hz), 8.18(1H, d, J=8.3 Hz), 8.71(1H, d, J=5.0 Hz)

4-[2-(4-Hydroxy-2-methoxyphenyl)-2-oxoethylthio]quinoline (Compound 12)

MS m/z: 325 (M⁺); NMR(CD₃ OD-CDCl₃) δ: 3.98(3H, s), 4.58(2H, s), 6.45-6.52(2H, m), 7.30(1H, d, J=5.3 Hz), 7.57(1H, ddd, J=1.0, 6.6, 8.3 Hz), 7.73(1H, ddd, J=1.7, 6.9, 8.6 Hz), 7.82(1H, d, J=9.2 Hz), 8.01(1H, brd, J=7.6 Hz), 8.19(1H, dd, J=0.8, 8.3 Hz), 8.60(1H, d, J=4.9 Hz)

4-[3-(4-Acetoaminophenyl)-3-oxopropylthio]quinoline (Compound 13)

MS m/z: 350 (M⁺); NMR(CDCl₃) δ: 2.22(3H, s), 3.4-3.6(4H, m), 7.27(1H, d, J=4.6 Hz), 7.46(1H, brs), 7.55(1H, ddd, J=1.0, 6.9, 8.2 Hz), 7.62(2H, d, J=8.6 Hz), 7.72(1H, ddd, J=1.6, 6.9, 8.6 Hz), 7.94(2H, d, J=8.9 Hz), 8.07(1H, d, J=8.6 Hz), 8.10(1H, d, J=8.6 Hz), 8.74(1H, d, J=5.0 Hz)

4-[2-[3-Bromo-4-(4-tert-butoxycarbonyl-1-piperazinyl)-phenyl]-2-oxoethylthio]quinoline (Compound 14)

MS m/z: 541 (M⁺); NMR(CDCl₃) δ: 1.49(9H, s), 3.11(4H, brt, J=4.9 Hz), 3.63(4H, brt, J=5.0 Hz), 4.46(2H, s), 7.04(1H, d, J-8.6 Hz), 7.30(1H, d, J=5.0 Hz), 7.56(1H, ddd, J=1.3, 6.9, 8.2 Hz), 7.73(1H, ddd, J=1.6, 6.9, 8.3 Hz), 7.94(1H, dd, J=2.2, 8.3 Hz), 8.08(1H, d, J=8.3 Hz), 8.16(1H, dd, J=1.0, 8.6 Hz), 8.22(1H, d, J=2.3 Hz), 8.73(1H, d, J=4.6 Hz)

4-[2-[4-(4-Methoxyphenoxy)phenyl]-2-oxoethylthio]-quinoline (Compound 15)

MS m/z: 401 (M⁺); NMR(CDCl₃) δ: 3.83(3H, s), 4.52(2H, s), 6.9-7.1(6H, m), 7.33(1H, d, J=5.0 Hz), 7.59(1H, ddd, J=1.3, 6.9, 8.3 Hz), 7.76(1H, ddd, J=1.3, 6.9, 8.3 Hz), 8.00(2H, d, J=9.2 Hz), 8.1-8.2(2H, m), 8.72(1H, d, J=5.0 Hz)

4-[1,1-Dimethyl-2-(4-methoxyphenyl)-2-oxoethylthio]-quinoline (Compound 16)

MS m/z: 337 (M⁺); NMR(CDCl₃) δ: 1.75(6H, s), 3.83(3H, s), 6.90(2H, d, J=9.2 Hz), 7.23(1H, d, J=4.6 Hz), 7.59(1H, ddd, J=1.3, 6.4, 8.2 Hz), 7.72(1H, ddd, J=1.3, 6.9, 8.6 Hz), 8.11(1H, brd, J=8.3 Hz), 8.34(1H, dd, J=2.0, 7.3 Hz), 8.36(2H, d, J=9.2 Hz), 8.64(1H, d, J=4.6 Hz)

4-(2-(3,4,5-Trimethoxyphenyl)-2-oxoethylthio]quinoline (Compound 17)

MS m/z: 369 (M⁺); NMR(CDCl₃) δ: 3.92(6H, s), 3.95(3H, s), 4.53(2H, s), 7.27(2H, s), 7.34(1H, d, J=5.0 Hz), 7.59(1H, ddd, J=1.3, 6.9, 8.3 Hz), 7.76(1H, ddd, J=1.3, 6.9, 8.6 Hz), 8.15(1H, brd, J=8.6 Hz), 8.19(1H, dd, J=1.0, 8.6 Hz), 8.73(1H, d, J=4.6 Hz)

4-[2-(4-Hydroxy-3-methoxyphenyl)-2-oxoethylthioo]quinoline

MS m/z: 325 (M⁺); NMR(CD₃ OD-CDCl₃) δ: 3.95(3H, s), 4.64(2H, s), 6.96(2H, d, J=9.2 Hz), 7.41(1H, d, J=5.0 Hz), 7.58(1H, d, J=2.0 Hz), 7.6-7.7(2H, m), 7.81(1H, ddd, J=1.3, 6.9, 8.6 Hz), 8.09(1H, d, J=8.3 Hz), 8.24(1H, d, J=8.2 Hz), 8.68(1H, brs)

4-[2-(3-Benzyloxyphenyl)-2-oxoethylthio]quinoline (Compound 18)

MS m/z: 385 (M⁺); NMR(CDCl₃) δ: 4.53(2H, s), 5.12(2H, s), 7.22-7.24(1H, m), 7.29(1H, d, J=4.6 Hz), 7.31-7.46(6H, m), 7.54-7.64(3H, m), 7.74(1H, dd, J=7.1, 8.3 Hz)t 8.11(1H, d, J=8.3 Hz), 8.17(1H, d, J=8.3 Hz), 8.72(1H, d, J=4.6 Hz)

4-[2-(4-Pivaloylaminophenyl)-2-oxoethylthio]quinoline (Compound 19)

MS m/z: 378 (M⁺); NMR(CDCl₃) δ: 1.34(9H, s), 4.52(2H, s), 7.30(1H, d, J=4.6 Hz), 7.52-7.59(2H, m), 7.70(2H, d, J=8.7 Hz), 7.73(1H, dd, J=6.9, 8.3 Hz), 8.02(2H, d, J=8.7 Hz), 8.07(1H, d, J=8.3 Hz), 8.16(1H, d, J=8.3 Hz), 8.72(1H, d, J=4.6 Hz)

4-[2-(4-Benzylamino-3-bromophenyl)-2-oxoethylthio]-quinoline (Compound 20)

MS m/z: 462 (M⁺); NMR(CDCl₃) δ: 4.42(2H, s), 4.50(2H, d, J=5.5 Hz), 5.42(1H, brt, J=5.5 Hz), 6.61(1H, d, J=8.6 Hz), 7.29(1H, d, J=4.6 Hz), 7.31-7.42(5H, m), 7.55(1H, dd, J=6.9, 8.3 Hz), 7.72(1H, dd, J=6.9, 8.3 Hz), 7.84(1H, dd, J=2.0, 8.6 Hz), 8.07(1H, d, J=8.3 Hz), 8.16(1H, d, J=8.3 Hz), 8.17(1H, d, J=2.0 Hz), 8.71(1H, d, J=4.6 Hz)

4-[2-[4-(N-Acetylbenzylamino)phenyl]-2-oxoethylthio]-quinoline (Compound 21)

MS m/z: 426 (M⁺); NMR(CDCl₃) δ: 1.96(3H, s), 4.50(2H, s), 4.94(2H, s), 7.15-7.22(3H, m), 7.24-7.28(4H, m), 7.30(1H, d, J=4.6 Hz), 7.57(1H, dd, J=7.0, 8.3 Hz), 7.74(1H, dd, J=7.0, 8.3 Hz), 7.99(2H, d, J=8.6 Hz), 8,10(1H, d, J=8.3 Hz), 8.15(1H, d, J=8.3 Hz), 8.72(1H, d, J=4.6 Hz)

4-[2-(4-Piperidinophenyl)-2-oxoethylthio]quinoline (Compound 22)

MS m/z: 362 (M⁺); NMR(CDCl₃) δ: 1.68(6H, brs), 3.40(4H, brs), 4.47(2H, s), 6.86(2H, d, J=9.2 Hz), 7.31(1H, d, J=4.8 Hz), 7.55(1H, dd, J=6.9, 8.3 Hz), 7.71(1H, dd, J=6.9, 8.3 Hz), 7.93(2H, d, J=9.2 Hz), 8.06(1H, d, J=8.3 Hz), 8.18(1H, d, J=8.3 Hz), 8.71(1H, d, J=4.8 Hz)

4-[2-(4-Benzylaminophenyl)-2-oxoethylthio]quinoline (Compound 23)

MS m/z: 384 (M⁺); NMR(CDCl₃) δ: 4.42(2H, d, J=5.4 Hz), 4.45(2H, s), 4.76(1H, brt, J=5.4 Hz), 6.63(2H, d, J=8.9 Hz), 7.29(1H, d, J=4.6 Hz), 7.31-7.40(5H, m), 7.54(1H, dd, J=7.0, 8.4 Hz), 7.71(1H, dd, J=7.0, 8.4 Hz), 7.90(2H, d, J=8.9 Hz), 8.06(1H, d, J=8.4 Hz), 8.17(1H, d, J=8.4 Hz), 8.70(1H, d, J=4.6 Hz)

4-[2-(4-tert-Butoxycarbonylaminophenyl)ethylthio]-quinoline (Compound 24)

MS m/z: 380 (M⁺); NMR(CDCl₃) δ: 1.52(9H, s), 3.04(2H, m), 3.33(2H, m), 6.45(1H, s), 7.15-7.20(3H, m), 7.32(2H, d, J=8.3 Hz), 7.54(1H, m), 7.71(1H, m), 8.05-8.13(2H, m), 8.72(1H, d, J=5.0 Hz)

4-[2-(4-Benzyloxyphenyl)ethylthio]quinoline (Compound 25)

MS m/z: 371 (M⁺); NMR(CDCl₃) δ: 3.05(2H, t, J=7.5 Hz), 3.38(2H, t, J=7.5 Hz), 5.06(2H, s), 6.95(2H, d, J=8.9 Hz), 7.15-7.45(8H, m), 7.60(1H, m), 7.75(1H, m), 8.15(2H, m), 8.70(1H, d, J=4.9 Hz)

4-[2-(4-Dimethylaminophenyl)-2-oxoethylthio]quinoline (Compound 26)

MS m/z: 322 (M⁺); NMR(CDCl₃) δ: 3.06(6H, s), 4.47(2H, s), 6.68(2H, d, J=8.9 Hz), 7.32(1H, d, J=4.9 Hz), 7.54(1H, m), 7.71(1H, m), 7.95(2H, d, J=9.2 Hz), 8.05(1H, d, J=8.2 Hz), 8.17(1H, dd, J=1.0, 8.2 Hz), 8.71(1H, d, J=4.6 Hz)

4-[2-(4-Dimethylaminophenyl)ethylthio]quinoline (Compound 27)

MS m/z: 308 (M⁺); NMR(CDCl₃) δ: 2.94(6H, s), 3.00(2H, m), 3.32(2H, m), 6.72(2H, d, J=8.9 Hz), 7.15(2H, d, J=8.9 Hz), 7.20(1H, d, J=4.9 Hz), 7.53(1H, m), 7.72(1H, m), 8.04-8.15(2H, m), 8.71(1H, d, J=4.9 Hz)

4-[2-[4-(1-Pivaloyl-4-piperidinyl)phenyl]-2-oxoethylthio]-quinoline (Compound 28)

MS m/z: 446 (M⁺); NMR(CDCl₃) δ: 1.32(9H, s), 1.57-1.73(2H, m), 1.92(2H, brd, J=11.5 Hz), 2.80-2.94(3H, m), 4.52(2H, s), 4.61(2H, brd, J=13.5 Hz), 7.30(1H, d, J=4.6 Hz), 7.34(2H, d, J=8.2 Hz), 7.56(1H, dd, J=7.0, 8.3 Hz), 7.72(1H, dd, J=7.0, 8,3 Hz), 7.99(2H, d, J=8.2 Hz), 8.07(1H, d, J=8.3 Hz), 8.16(1H, d, J=8.3 Hz), 8.72(1H, d, J=4.6 Hz)

4-[2-[4-(4-Isobutyl-1-piperazinyl)phenyl]-2-oxoethylthio]quinoline (Compound 29)

MS m/z: 419 (M⁺); NMR(CDCl₃) δ: 0.93(6H, t, J=6.6 Hz), 1.81(1H, m), 2.14(2H, d, J=7.6 Hz), 3.54(4H, t, J=5.0 Hz), 3.40(4H, t, J=5.0 Hz), 4.48(2H, s), 6.88(2H, d, J=8.9 Hz), 7.31(1H, d, J=5.0 Hz), 7.55(1H, t, J=7.8 Hz), 7.71(1H, t, J=7.8 Hz), 7.95(2H, d, J=8.6 Hz), 8.07(1H, d, J=8.3 Hz), 8.17(1H, d, J=8.9 Hz), 8.71(1H, d, J=4.6 Hz)

4-[2-(4-tert-Butoxycarbonylaminophenyl)-2-oxoethylthio]-quinoline (Compound 30)

MS m/z: 394 (M⁺); NMR(CDCl₃) δ: 1.53(9H, s), 4.51(2H, s), 6.75(1H, s), 7.29(1H, d, J=4.9 Hz), 7.45-7.55(3H, m), 7.70(1H, m), 7.90-8.20(4H, m), 8.72(1H, d, J=4.9 Hz)

4-[4-(4-Formyl-1-piperazinylmethyl)benzylthio]-7-methylthioquinoline (Compound 64)

MS m/z: 423 (M⁺); NMR(CDCl₃) δ: 2.42(4H, m), 2.60(3H, s), 3.38(2H, m), 3.47(2H, s), 3.56(2H, m), 4.31(2H, s), 7.14(1H, d, J=5.0 Hz), 7.27-7.41(5H, m), 7.75(1H, d, J=2.0 Hz), 7.98(1H, d, J=8.6 Hz), 8.02(1H, s), 8.62(1H, d, J=5.0 Hz)

4-[2-[3-Bromo-4-(1-tert-butoxycarbonyl-3-pyrrolidinylamino)phenyl]-2-oxoethylthio]quinoline (Compound 65)

MS m/z: 541 (M⁺); NMR(CDCl₃) δ: 1.46(9H, s), 1.9-2.0(1H, m), 2.2-2.3(1H, m), 3.49(1H, dd, J=3.9, 10.3 Hz), 3.5-3.6(1H, m), 3.7-3.8(2H, m), 4.33(1H, brs), 4.44(2H, s), 4.73(1H, brs), 6.77(1H, d, J=8.8 Hz), 7.31(1H, d, J=5.0 Hz), 7.56(1H, ddd, J=1.5, 6.8, 8.3 Hz), 7.72(1H, ddd, J=1.5, 6.8, 8.3 Hz), 7.84(1H, dd, J=2.0, 8.8 Hz), 8.07(1H, d, J=8.3 Hz), 8.17(2H, m), 8.72(1H, d, J=5.0 Hz)

4-[2-[3-Bromo-4-(4-neopentyl-1-piperazinyl)phenyl]-2-oxoethylthio]quinoline (Compound 66)

MS m/z: 511 (M⁺); NMR(CDCl₃) δ: 0.90(9H, s), 2.15(2H, s), 2.73(4H, t, J=4.8 Hz), 3.17(4H, t, J=4.6 Hz), 4.46(2H, s), 7.05(1H, d, J=8.6 Hz), 7.30(1H, d, J=5.0 Hz), 7.56(1H, ddd, J=1.3, 6.9, 8.2 Hz), 7.72(1H, ddd, J=1.3, 6.9, 8.3 Hz), 7.92(1H, dd, J=2.3, 8.6 Hz), 8.08(1H, d, J=8.3 Hz), 8.16(1H, d, J=8.3 Hz), 8.20(1H, d, J=2.3 Hz), 8.73(1H, d, J=5.0 Hz)

4-[2-[4-[4-(4-Bromophenyl)-1-piperazinyl]phenyl]-2-oxoethylthio]quinoline (Compound 67)

MS m/z: 517 (M⁺); NMR(CDCl₃) δ: 3.32(4H, dd, J=0.7, 5.0 Hz), 3.56(4H, dd, J=4.6, 6.9 Hz), 4.48(2H, s), 6.82(2H, d, J=9.2 Hz), 6.93(2H, d, J=8.9 Hz), 7.32(1H, d, J=4.6 Hz), 7.38(2H, d, J=8.9 Hz), 7.55(1H, ddd, J=1.3, 6.9, 8.2 Hz), 7.72(1H, ddd, J=1.3, 6.9, 8.3 Hz), 7.98(2H, d, J=9.2 Hz), 8.07(1H, d, J=8.3 Hz), 8.17(1H, dd, J=0.7, 8.3 Hz), 8.71(1H, d, J=4.6 Hz)

4-[2-[4-[4-(2-Pyrimidyl)-1-piperazinyl]phenyl]-2-oxoethylthio]quinoline (Compound 68)

MS m/z: 441 (M⁺); NMR(DMSO-d₆) δ: 3.48(4H, t, J=5.1 Hz), 3.83(4H, t, J=5.1 Hz), 5.22(2H, s), 6.63(1H, t, J=4.5 Hz), 7.02(2H, d, J=8.9 Hz), 7.82(1H, d, J=5.9 Hz), 7.89(1H, t, J=7.4 Hz), 7.97(2H, d, J=8.9 Hz), 8.00-8.20(2H, m), 8.35(2H, d, J=4.6 Hz), 8.40(1H, d, J=8.6 Hz), 8.97(1H, d, J=5.9 Hz)

4-[2-[4-(Heptylamino)phenyl]-2-oxoethylthio]quinoline (Compound 69)

MS m/z: 392 (M⁺); NMR(CDCl₃) δ: 0.89(3H, t, J=6.9 Hz), 1.2-1.5(8H, m), 1.65(2H, quint., J=6.9 Hz), 3.20(2H, q, J=6.6 Hz), 4.32(1H, brs), 4.46(2H, s), 6.57(2H, d, J=8.6 Hz), 7.31(1H, d, J=5.0 Hz), 7.55(1H, ddd, J=1.3, 6.9, 8.2 Hz), 7.71(1H, ddd, J=1.3, 6.9, 8.2 Hz), 7.90(2H, d, J=8.9 Hz), 8.06(1H, d, J=8.6 Hz), 8.18(1H, d, J=8.3 Hz), 8.72(1H, d, J=5.0 Hz)

4-[2-[4-[2-(N-Isobutyl-N-methylamino)acetylamino]-phenyl]ethylthio]quinoline (Compound 70)

MS m/z: 407 (M⁺); NMR(CDCl₃) δ: 0.97(6H, d, J=6.6 Hz), 2.25(2H, d, J=7.3 Hz), 2.34(3H, s), 3.10(2H, m), 3.11(2H, s), 3.34(2H, m), 7.21(1H, d, J=4.6 Hz), 7.55(3H, m), 8.06(1H, m), 8.13(1H, m), 8.72(1H, d, J=4.9 Hz), 9.26(1H, bs)

4-[2-[4-(3-Isobutyl-5-oxo-1-imidazolidinyl)phenyl]-2-oxoethylthio]quinoline (Compound 71)

MS m/z: 419 (M⁺); NMR(CDCl₃) δ: 0.95(6H, d, J=6.6 Hz), 1.75(1H, m), 2.45(2H, d, J=7.3 Hz), 3.47(2H, s), 4.52(2H, s), 4.58(2H, s), 7.30(1H, d, J=4.6 Hz), 7.56(1H, m), 7.72(3H, m), 8.06(3H, m), 8.16(1H, m), 8.72(1H, d, J=4.9 Hz)

4-[2-[4-[N-[2-(N-Isobutyl-N-methylamino)ethyl]-N-methylamino]phenyl]ethylthio]quinoline (Compound 72)

MS m/z: 407 (M⁺); NMR(CDCl₃)δ: 0.90(6H, d, J=6.6 Hz), 1.75(1H, m), 2.14(2H, d, J=7.3 Hz), 2.27(3H, s), 2.52(2H, m), 2.95(3H, s), 3.00(2H, m), 3.31(2H, m), 3.44(2H, m), 6.69(2H, d, J=2.0 Hz), 7.14(2H, d, J=2.0 Hz), 7.21(1H, d, J=4.9 Hz), 7.55(1H, m), 7.71(1H, m), 8.09(1H, m), 8.15(1H, m), 8.70(1H, d, J=4.6 Hz)

4-[2-[4-(1-Pivaloyl-1,2,5,6-tetrahydropyrid-4-yl)phenyl]-2-oxoethylthio]quinoline (Compound 74)

MS m/z: 444 (M⁺); NMR(CDCl₃)δ: 1.33(9H, s), 2.60(2H, brs), 3.86(2H, t, J=5.6 Hz), 4.29-4.33(2H, m), 4.53(2H, s), 6.27(1H, t, J=3.6 Hz), 7.31(1H, d, J=4.8 Hz), 7.51(2H, d, J=8.6 Hz), 7.56(1H, dd, J=6.9, 8.3 Hz), 7.73(1H, dd, J=6.9, 8.3 Hz), 8.01(2H, d, J=8.6 Hz), 8.08(1H, d, J=8.3 Hz), 8.16(1H, d, J=8.3 Hz), 8.73(1H, d, J=4.8 Hz)

4-[2-[4-(1-tert-Butoxycarbonyl-4-piperidinyl)phenyl]-2-oxoethylthio]quinoline (Compound 75)

MS m/z: 462 (M⁺); NMR(CDCl₃)δ: 1.49(9H, s), 1.56-1.72(2H, m), 1.84(2H, brd, J=12.5 Hz), 2.68-2.87(3H, m), 4.27(2H, brd, J=11.2 Hz), 4.53(2H, s), 7.30(1H, d, J=4.8 Hz), 7.34(2H, d, J=8.4 Hz), 7.56(1H, dd, J=6.9, 8.5 Hz), 7.72(1H, dd, J=6.9, 8.5 Hz), 7.99(2H, d, J=8.4 Hz), 8.07(1H, d, J=8.5 Hz), 8.16(1H, d, J=8.5 Hz), 8.72(1H, d, J=4.8 Hz)

Example 2

4-(4-Dimethylaminobenzylthio)-7-methylthioquinoline (Compound 31)

Thionyl chloride (2.28 ml, 31.3 mmol) was added at 0° C. to 4-dimethylaminobenzyl alcohol (4.36 g, 28.9 mmol) dissolved in methylene chloride (70 ml) and stirred still at 0° C. for one hour. The solvent was removed under reduced pressure. The residue was suspended in dry acetone (150 ml). 7-Methylthioguinoline-4(1H)-thione (4.98 g, 24.0 mmol) was added to the suspension and stirred at room temperature overnight. The reaction mixture was made basic with 2N aqueous solution of sodium hydroxide and extracted with chloroform three times. The combined chloroform layers were washed with saturated saline solution, and dried over magnesium sulfate. The solvent was removed under reduced pressure and the residue was recrystallized from ethyl acetate to obtain 4.19 g of the titled compound (51%) as white crystal.

Melting Point: 168.0-170.0° C.; MS m/z: 340 (M⁺); NMR(CDCl₃) δ: 2.61(3H, s), 2.95(6H, s), 4.30(2H, s), 6.70(2H, d, J=8.6 Hz), 7.15-7.4(4H, m), 7.85(1H, s), 7.97(1H, d, J=8.9 Hz), 8.59(1H, d, J=4.9 Hz)

In accordance with the procedure of the Example 2, the following compounds were obtained from corresponding starting materials.

4-[1-[4-(2,2,2-Trichloroethoxy)carbonylaminophenyl]-ethylthio]-7-methylthioquinoline (Compound 32)

MS m/z: 501 (M⁺); NMR(CDCl₃) δ: 1.75(3H, d, J=7.0 Hz), 2.59(3H, s), 4.63(1H, q, J=7.0 Hz), 4.82(2H, s), 6.95(1H, brd), 7.08(1H, d, J=5.0 Hz), 7.37(1H, d, J=2.0 Hz), 7.39-7.43(4H, m), 7.73(1H, d, J=2.0 Hz), 8.05(1H, d, J=8.9 Hz), 8.56(1H, d, J=5.0 Hz)

4-[1-(4-Dimethylaminophenyl)ethylthio]-7-methylthio-quinoline (Compound 33)

MS m/z: 354 (M⁺); NMR(CDCl₃) δ: 1.74(3H, d, J=6.9 Hz), 2.59(3H, s), 2.93(6H, s), 4.62(1H, q, J=6.9 Hz), 6.68(2H, d, J=8.9 Hz), 7.15(1H, d, J=5.0 Hz), 7.31(1H, d, J=8.9 Hz), 7.37(1H, dd, J=2.0, 8.9 Hz), 7.73(1H, d, J=2.0 Hz), 8.05(1H, d, J=8.9 Hz), 8.57(1H, d, J=5.0 Hz)

4-(4-Aminobenzylthio)-7-methylthioquinoline (Compound 34) MS m/z: 312 (M⁺); NMR(CDCl₃) δ: 2.60(3H, s), 4.26(2H, s), 6.66(2H, d, J=8.6 Hz), 7.15-7.25(3H, m), 7.39(1H, dd, J=2.3, 8.9 Hz), 7.82(1H, d, J=2.3 Hz), 7.97(1H, d, J=8.9 Hz), 8.60(1H, d, J=4.9 Hz)

4-(4-Isobutylaminobenzylthio)-7-methoxyquinoline (Compound 35)

MS m/z: 352 (M⁺); NMR(CDCl₃) δ: 0.98(6H, d, J=6.6 Hz), 1.88(1H, m), 2.93(2H, d, J=6.9 Hz), 3.95(3H, s), 4.25(2H, s), 6.56(2H, d, J=8.2 Hz), 7.13-7.25(4H, m), 7.45(1H, m), 8.00(1H, d, J=9.2 Hz), 8.60(1H, d, J=4.9 Hz)

4-(4-Ethylaminobenzylthio)-7-methylthioquinoline (Compound 36)

MS m/z: 340 (M⁺); NMR(CDCl₃) δ: 1.26(3H, t, J=7.3 Hz), 2.60(3H, s), 3.15(2H, q, J=7.3 Hz), 4.25(2H, s), 6.57(2H, d, J=8.6 Hz), 7.18(1H, d, J=4.9 Hz), 7.23(2H, d, J=8.6 Hz), 7.38(1H, dd, J=2.0, 8.9 Hz), 7.80(1H, d, J=1.7 Hz), 7.98(1H, d, J=8.6 Hz), 8.60(1H, d, J=4.9 Hz)

4-[4-(3,5,5-Trimethylhexylamino)benzylthio]-7-methylthioquinoline (Compound 37)

FAB-MS m/z: 438 [M+H]⁺ ; NMR(CDCl₃) δ: 0.90(9H, s), 0.97(3H, d, J=6.6 Hz), 1.05-1.65(5H, m), 2.59(3H, s), 3.09(2H, m), 4.23(2H, s), 6.57(2H, d, J=8.6 Hz), 7.15(1H, d, J=5.0 Hz), 7.25(2H, d, J=8.6 Hz), 7.36(1H, dd, J=2.0, 8.9 Hz), 7.74(1H, d, J=2.0 Hz), 7.97(1H, d, J=8.9 Hz), 8.61(1H, d, J=5.0 Hz)

4-[4-(2-β-Naphtyl-2-oxoethylamino)benzylthio]-7-methylthioquinoline (Compound 38)

MS m/z: 478 (M⁺ -2); NMR(CDCl₃) δ: 2.59(3H, s), 4.27(2H, s), 4.76(2H, d, J=4.0 Hz), 5.10(1H, bs), 6.74(2H, d, J=8.6 Hz), 7.16(1H, d, J=5.0 Hz), 7.30(2H, d, J=8.6 Hz), 7.37(1H, dd, J=2.0, 8.9 Hz), 7.63(2H, m), 7.75(1H, d, J=2.0 Hz), 7.90-8.10(5H, m), 8.55(1H, s), 8.63(1H, d, J=4.6 Hz)

4-(3-Methyl-4-methylaminobenzylthio)-7-methylthioquinoline (Compound 39)

MS m/z: 340 (M⁺); NMR(CDCl₃) δ: 2.13(3H, s), 2.60(3H, s), 2.90(3H, s), 4.26(2H, s), 6.57(1H, d, J=8.3 Hz), 7.10-7.40(4H, m), 7.82(1H, bs), 7.97(1H, d, J=8.9 Hz), 8.60(1H, d, J=4.9 Hz)

4-(3-Methyl-4-dimethylaminobenzylthio)-7-methylthioquinoline (Compound 40)

MS m/z: 354 (M⁺); NMR(CDCl₃) δ: 2.32(3H, s), 2.61(3H, s), 2.70(6H, s), 4.28(2H, s), 6.99(1H, d, J=8.6 Hz), 7.20(3H, m), 7.40(1H, dd, J=2.0, 8.9 Hz), 7.85(1H, s), 7.98(1H, d, J=8.9 Hz), 8.60(1H, d, J=4.9 Hz)

4-[3,4-Bis(dimethylamino)benzylthio]-7-methylthioquinoline (Compound 41)

MS m/z: 383 (M⁺); NMR(CDCl₃) δ: 2.60(3H, s), 2.77(6H, s), 2.78(6H, s), 4.25(2H, s), 6.80-7.00(3H, m), 7.18(1H, d, J=4.9 Hz), 7.36(1H, dd, J=2.0, 8.6 Hz), 7.74(1H, d, J=2.0 Hz), 7.98(1H, d, J=8.9 Hz), 8.63(1H, d, J=4.9 Hz)

4-(4-Dimethylaminobenzylthio)-7-dimethylaminoquinoline (Compound 42)

MS m/z: 337 (M⁺); NMR(CDCl₃) δ: 2.96(6H, s), 3.13(6H, s), 4.29(2H, s), 6.70(2H, d, J=8.9 Hz), 7.02(1H, d, J=5.3 Hz), 7.14(1H, dd, J=2.6, 9.2 Hz), 7.23-7.31(3H, m), 7.95(1H, d, J=9.6 Hz), 8.45(1H, d, J=5.3 Hz)

4-(4-Morpholinobenzylthio)-7-methylthioquinoline (Compound 43)

MS m/z: 382 (M⁺); NMR(CDCl₃) δ: 2.60(3H, s), 3.16(4H, m), 3.85(4H, m), 4.27(2H, s), 6.87(2H, d, J=8.9 Hz), 7.14(1H, d, J=4.9 Hz), 7.33(2H, d, J=8.9 Hz), 7.37(1H, dd, J=2.3, 8.9 Hz), 7.74(1H, d, J=2.0 Hz), 7.97(1H, d, J=8.9 Hz), 8.61(1H, d, J=4.9 Hz)

4-[4-(1-Pyrrolidinyl)benzylthio]-7-methylthioquinoline (Compound 44)

MS m/z: 366 (M⁺); NMR(CDCl₃) δ: 2.00(4H, m), 2.61(3H, s), 3.28(4H, m), 6.53(2H, d, J=8.6 Hz), 7.21(1H, d, J=4.9 Hz), 7.29(2H, d, J=8.6 Hz), 7.38(1H, dd, J=2.0, 8.9 Hz), 7.84(1H, s), 7.98(1H, d, J=8.9 Hz), 8.59(1H, d, J=4.9 Hz)

4-(4-Piperidinobenzylthio)-7-methylthioquinoline (Compound 45)

MS m/z: 380 (M⁺); NMR(CDCl₃) δ: 1.50-1.80(6H, m), 2.60(3H, s), 3.16(4H, m), 4.25(2H, s), 6.89(2H, d, J=8.9 Hz), 7.15(1H, d, J=4.9 Hz), 7.29(2H, d, J=8.9 Hz), 7.36(1H, dd, J=2.0, 8.9 Hz), 7.74(1H, d, J=2.0 Hz), 7.97(1H, d, J=8.9 Hz), 8.61(1H, d, J=4.9 Hz)

4-[4-(4-Methyl-1-piperazinyl)benzylthio]-7-methylthioquinoline (Compound 46)

MS m/z: 395 (M⁺); NMR(CDCl₃) δ: 2.35(3H, s), 2.57(4H, m), 2.59(3H, s), 3.22(4H, m), 4.26(2H, s), 6.89(2H, d, J=8.6 Hz), 7.14(1H, d, J=4.9 Hz), 7.32(2H, d, J=8.6 Hz), 7.37(1H, dd, J=2.0, 8.9 Hz), 7.74(1H, d, J=2.0 Hz), 7.97(1H, d, J=8.9 Hz), 8.61(1H, d, J=4.9 Hz)

4-[4-[Bis(2-acetoxyethyl)amino]benzylthio]-7-methylthioquinoline (Compound 47)

MS m/z: 484 (M⁺); NMR(CDCl₃) δ: 2.04(6H, s), 2.60(3H, s), 3.60(4H, m), 4.24(6H, m), 6.72(2H, d, J=8.9 Hz), 7.16(1H, d, J=4.9 Hz), 7.29(2H, d, J=8.9 Hz), 7.37(1H, dd, J=2.0, 8.9 Hz), 7.74(1H, d, J=2.0 Hz), 7.96(1H, d, J=8.9 Hz), 8.62(1H, d, J=4.9 Hz)

4-[4-[N-(2-Acetoxyethyl)-2-hydroxyethylamino]benzylthio]-7-methylthioquinoline (Compound 48)

MS m/z: 442 (M⁺); NMR(CDCl₃) δ: 2.02(3H, s), 2.60(3H, s), 3.53(2H, m), 3.64(2H, m), 3.80(2H, m), 4.24(4H, m), 6.75(2H, d, J=8.9 Hz), 7.16(1H, d, J=5.0 Hz), 7.28(2H, d, J=8.9 Hz), 7.37(1H, dd, J=2.3, 8.9 Hz), 7.74(1H, d, J=2.3 Hz), 7.97(1H, d, J=8.9 Hz), 8.62(1H, d, J=5.0 Hz)

4-[4-(4-Formyl-1-piperazinyl)benzylthio]-7-methylthioquinoline (Compound 63)

MS m/z: 409 (M⁺); NMR(CDCl₃) δ: 2.60(3H, s), 3.18(4H, m), 3.52(2H, m), 3.70(2H, m), 4.26(2H, s), 6.90(2H, d, J=8.6 Hz), 7.14(1H, d, J=5.0 Hz), 7.34(2H, d, J=8.6 Hz), 7.37(1H, m), 7.74(1H, d, J=2.0 Hz), 7.97(1H, d, J=8.9 Hz), 8.11(1H, s), 8.61(1H, d, J=5.0 Hz)

Example 3

4-[2-[4-(4-tert-Butoxycarbonyl-1-piperazinyl)phenyl]-2-oxoethylthio]quinoline (Compound 49)

Quinoline-4(1H)-thione (2.00 g, 12.2 mmol) and potassium carbonate (5.40 g, 39.0 mmol) were suspended in dry acetone (400 ml). 1-Bromoacetyl-4-(1-piperazinyl)-benzene dihydrobromide (5.64 g, 12.2 mmol) was gradually added under ice cooling to the suspension and stirred at room temperature overnight. The solvent was removed under reduced pressure. The residue was added with ethanol (400 ml) and then added with di-tert-butyl dicarbonate (8.70 g). The reaction mixture was further stirred at room temperature overnight and the solvent was removed under reduced pressure. The residue was added with water, extracted with ethyl acetate, washed with saturated saline solution and dried over anhydrous magnesium sulfate. The solvent was removed under reduced pressure. The residue was chromatographed by silica gel column chromatography (n-hexane:ethyl acetate=1:4) to obtain 3.58 g of the titled compound (63.3%).

Melting Point: 153.0-154.5° C.; MS m/z: 463 (M⁺); NMR(CDCl₃) δ: 1.49(9H, s), 3.39(4H, brt, J=5.3 Hz), 3.59(4H, brt, J=5.3 Hz), 4.48(2H, s), 6.88(2H, d, J=9.2 Hz), 7.32(1H, d, J=5.0 Hz), 7.55(1H, ddd, J=1.3, 6.9, 8.2 Hz), 7.72(1H, ddd, J=1.2, 6,9, 8.3 Hz), 7.96(2H, d, J=8.9 Hz), 8.07(1H, brd, J=8.6 Hz), 8.17(1H, dd, J=1.0, 8.3 Hz), 8.71(1H, d, J=5.0 Hz)

In accordance with the procedure of the Example 3, the following compounds were obtained from corresponding starting materials.

4-[2-[4-[2-(4-tert-Butoxycarbonyl-1-piperazinyl)ethyl]-phenyl]-2-oxoethylthio]quinoline (Compound 50)

MS m/z: 491 (M⁺); NMR(CDCl₃) δ: 1.28(9H, s), 2.52(4H, brs), 2.68(2H, brt, J=8.3 Hz), 2.93(2H, brt, J=8.3 Hz), 3.50(4H, brs), 4.53(2H, s), 7.30(1H, d, J=5.0 Hz), 7.35(2H, d, J=8.3 Hz), 7.56(1H, ddd, J=1.3, 6.9, 8.2 Hz), 7.72(1H, ddd, J=1.3, 6.9, 8.3 Hz), 7.97(2H, d, J=8.3 Hz), 8.07(1H, d, J=7.9 Hz), 8.16(1H, d, J=8.2 Hz), 8.72(1H, d, J=4.6 Hz)

4-[2-[4-(4-tert-Butoxycarbonyl-1-homopiperazinyl)phenyl]-2-oxoethylthio]quinoline (Compound 76)

MS m/z: 477 (M⁺); NMR(CDCl₃) δ: 1.35(9H, s), 1.95-2.05(2H, m), 3.2-3.4(2H, m), 3.55-3.70(6H, m), 4.45(2H, s), 6.71(2H, d, J=8.9 Hz), 7.32(1H, d, J=5.4 Hz), 7.55(1H, t, J=7.6 Hz), 7.71(1H, ddd, J=1.0, 6.9, 7.9 Hz), 7.93(2H, d, J=8.9 Hz), 8.06(1H, d, J=8.6 Hz), 8.17(1H, d, J=8.3 Hz), 8.71(1H, d, J =4.6 Hz)

4-[2-[4-(4-tert-Butoxycarbonyl-1-piperazinyl)phenyl]-2-oxoethylthio]-6-fluoroquinoline (Compound 73)

MS m/z: 481 (M⁺); NMR(CDCl₃) δ: 1.48(9H, s), 3.38(4H, m), 3.59(4H, m), 4.46(2H, s), 6.88(2H, d, J=8.9 Hz), 7.34(1H, d, J=4.6 Hz), 7.47(1H, m), 7.79(1H, m), 7.95(2H, d, J=8.9 Hz), 8.06(1H, m), 8.67(1H, d, J=4.9 Hz)

Example 4

4-[2-[4-(1-Piperazinyl)phenyl]-2-oxoethylthio]quinoline hydrochloride (Compound 51)

4-[2-[4-(4-tert-Butoxycarbonyl-1-piperazinyl)phenyl]-2-oxoethylthio]quinoline (Compound 49; 2.8 g, 6.0 mmol) was gradually added to an ice-cooled solution of 4N hydrochloride dioxane solution (40 ml). The reaction mixture was stirred at room temperature for one hour. The resulting precipitates were collected by filtration and washed well with dry dioxane and dry ether to obtain 2.8 g of the titled compound (99%).

Melting Point: 217.5° C. (decomp.); FAB-MS m/z: 364 [M+H]⁺ ; NMR(DMSO-d₆) δ: 3.30(4H, brt, J=5.3 Hz), 3.60(4H, brt, J=5.3 Hz), 5.09(2H, s), 7.06(2H, d, J=9.2 Hz), 7.80(1H, d, J=6.3 Hz), 7.88(1H, m), 8.02(2H, d, J=9.2 Hz), 8.05-8.10(2H, m), 8.46(1H, brd, J=8.2 Hz), 8.47(1H, d, J=6.3 Hz)

Example 5

4-[2-[4-(4-Pivaloyl-1-piperazinyl)phenyl]-2-oxoethylthio]quinoline (Compound 52)

4-[2-[4-(1-Piperazinyl)phenyl]-2-oxoethylthio]-quinoline hydrochloride (Compound 51; 2.20 g, 4.66 mmol) was suspended in dry acetone (300 ml). Triethylamine (6.60 ml, 47.2 mmol) was added at -15° C. to the suspension and, after 30 minutes, pivaloylchloride (1.25 ml, 10.0 mmol) was added dropwise to the suspension. The reaction mixture was stirred at room temperature overnight and the solvent was removed under reduced pressure. The residue was chromatographed by silica gel chromatography (dichloromethane:methanol=20:1) to obtain 1.50 g of the titled compound (72.0%).

Melting Point: 174.5-175.5° C.; MS m/z: 447 (M⁺); NMR(CDCl₃) δ: 1.32(9H, s), 3.41(4H, t, J=5.0 Hz), 3.83(4H, t, J=5.0 Hz), 4.53(2H, s), 6.90(2H, d, J=9.2 Hz), 7.37(1H, d, J=5.0 Hz), 7.61(1H, brt, J=7.9 Hz), 7.78(1H, brt, J=7.9 Hz), 7.97(2H, d, J=8.9 Hz), 8.15-8.25(2H, m), 8.72(1H, d, J=5.0 Hz)

In accordance with the procedure of the Example 5, the following compounds were obtained from corresponding starting materials.

4-[2-[4-[4-(4-Methoxycinnamoyl)-1-piperazinyl]phenyl]-2-oxoethylthio]quinoline (Compound 53)

MS m/z: 523 (M⁺); NMR(CDCl₃) δ: 3.48(4H, brt, J=5.2 Hz), 3.84(3H, s), 3.88(4H, brs), 4.48(2H, s), 6.76(1H, d, J=15.2 Hz), 6.90(2H, d, J=8.9 Hz), 6.91(2H, d, J=8.9 Hz), 7.32(1H, d, J=4.9 Hz), 7.49(2H, d, J=8.9 Hz), 7.55(1H, ddd, J=1.0, 6.9, 8.3 Hz), 7.70(1H, d, J=15.5 Hz), 7.72(1H, ddd, J=1.3, 6.9, 8.3 Hz), 7.98(2H, d, J=8.9 Hz), 8.07(1H, brd, J=7.9 Hz), 8.17(1H, brd, J=8.2 Hz), 8.71(1H, d, J=5.0 Hz)

4-[2-[4-(4-Diethylaminothiocarbonyl-1-piperazinyl)-phenyl]-2-oxoethylthio]quinoline (Compound 54)

MS m/z: 478 (M⁺); NMR(CDCl₃) δ: 1.24(6H, t, J=6.9 Hz), 3.49(4H, brs), 3.61(4H, brs), 3.66(4H, q, J=7.3 Hz), 4.49(2H, s), 6.68(2H, d, J=8.9 Hz), 7.32(1H, d, J=5.0 Hz), 7.55(1H, ddd, J=1.3, 6.9, 8.2 Hz), 7.72(1H, ddd, J=1.3, 6.9, 8.3 Hz), 7.96(2H, d, J=8.9 Hz), 8.08(1H, d, J=8.3 Hz), 8.17(1H, d, J=8.6 Hz), 8.71(1H, d, J=5.0 Hz)

4-[2-[4-(4-Benzyloxycarbonyl-1-piperazinyl)phenyl)-2-oxoethylthio]quinoline (Compound 78)

MS m/z: 497 (M⁺); NMR(CDCl₃) δ: 3.40(4H, t, J=5.0 Hz), 3.68(4H, t, J=5.3 Hz), 4.47(2H, s), 5.17(2H, s), 6.88(2H, d, J=9.2 Hz), 7.31(1H, d, J=4.6 Hz), 7.37(5H, s), 7.55(1H, ddd, J=1.0, 6.9, 8.2 Hz), 7.71(1H, ddd, J=1.3, 6.9, 8.3 Hz), 7.96(2H, d, J=9.2 Hz), 8.06(1H, d, J=8.6 Hz), 8.17(1H, dd, J=1.0, 8.3 Hz), 8.71(1H, d, J=5.0 Hz)

4-[2-[4-[4-(N-tert-Butoxycarbonylvalyl)-1-piperazinyl]-phenyl]-2-oxoethylthio]quinoline (Compound 79) MS m/z: 562 (M⁺);

NMR(CDCl₃) δ: 0.95(6H, dd, J=6.6, 15.5 Hz), 1.44(9H, s), 1.96(1H, m), 3.4-3.5(4H, m), 3.6-4.0(4H, m), 4.48(3H, m), 5.28(1H, d, J=8.9 Hz), 6.89(2H, d, J=8.9 Hz), 7.31(1H, d, J=4.6 Hz), 7.55(1H, ddd, J=1.3, 6.9, 8.2 Hz), 7.72(1H, ddd, J=1.3, 6.9, 8.3 Hz), 7.97(2H, d, J=8.9 Hz), 8.07(1H, dd, J=0.7, 8.6 Hz), 8.17(1H, dd, J=1.0, 8.6 Hz), 8.71(1H, d, J=4.6 Hz)

4-[2-[4-(4-Phenoxycarbonyl-1-piperazinyl)phenyl]-2-oxoethylthio]quinoline (Compound 80)

MS m/z: 483 (M⁺); NMR(CDCl₃) δ: 3.50(4H, brt, J=5.3 Hz), 3.80(4H, brs), 4.49(2H, s), 6.93(2H, d, J=8.9 Hz), 7.13(2H, brd, J=7.6 Hz), 7.25(1H, brt, J=7.6 Hz), 7.33(1H, d, J=5.0 Hz), 7.38(2H, t, J=7.6 Hz), 7.56(1H, ddd, J=1.3, 6.9, 8.2 Hz), 7.72(1H, ddd, J=1.3, 6.9, 8.3 Hz), 7.99(2H, d, J=8.9 Hz), 8.07(1H, d, J=7.9 Hz), 8.17(1H, dd, J=1.0, 8.6 Hz), 8.72(1H, d, J=5.0 Hz)

4-[2-[4-[4-(2,2,2-Trichloroethoxycarbonyl)-1-piperazinyl]phenyl]-2-oxoethylthio]quinoline (Compound 81)

MS m/z:537 (M⁺); NMR(CDCl₃) δ: 3.45(4H, brt, J=5.3 Hz), 3.75(4H, brs), 4.48(2H, s), 4.80(2H, s), 6.90(2H, d, J=9.2 Hz), 7.32(1H, d, J=5.0 Hz), 7.55(1H, ddd, J=1.3, 6.9, 8.2 Hz), 7.72(1H, ddd, J=1.3, 6.9, 8.6 Hz), 7.97(2H, d, J=8.9 Hz), 8.07(1H, d, J=8.3 Hz), 8.17(1H, d, J=9.2 Hz), 8.72(1H, d, J=4.6 Hz)

4-[2-[4-(4-Ethoxycarbonyl-1-piperazinyl)phenyl]-2-oxoethylthio]quinoline (Compound 82)

MS m/z: 435 (M⁺); NMR(CDCl₃) δ: 1.29(3H, t, J=7.1 Hz), 3.40(4H, t, J=5.3 Hz), 3.65(4H, t, J=5.3 Hz), 4.19(2H, q, J=7.3 Hz), 4.48(2H, s), 6.89(2H, d, J=8.9 Hz), 7.32(1H, d, J=5.0 Hz), 7.55(1H, ddd, J=1.3, 6.9, 8.2 Hz), 7.72(1H, ddd, J=1.3, 6.9, 8.2 Hz), 7.96(2H, d, J=9.2 Hz), 8.07(1H, d, J=8.3 Hz), 8.17(1H, dd, J=1.0, 8.6 Hz), 8.72(1H, d, J=5.0 Hz)

4-[2-[4-(4-Allyloxycarbonyl-1-piperazinyl)phenyl]-2-oxoethylthio]guinoline (Compound 83)

MS m/z: 447 (M⁺); NMR(CDCl₃) δ: 3.41(4H, t, J=5.3 Hz), 3.67(4H, t, J=5.3 Hz), 4.47(2H, s), 4.64(2H, dt, J=1.3, 5.6 Hz), 5.24(1H, dd, J=1.3, 10.2 Hz), 5.32(1H, dd, J=1.3, 17.2 Hz), 5.90-6.05(1H, m), 6.89(2H, d, J=9.2 Hz), 7.31(1H, d, J=4.6 Hz), 7.55(1H, ddd, J=1.3, 6.9, 8.2 Hz), 7.72(1H, ddd, J=1.3, 6.9, 8.3 Hz), 7.97(2H, d, J=8.9 Hz), 8.06(1H, d, J=8.6 Hz), 8.17(1H, d, J=7.9 Hz), 8.71(1H, d, J=5.0 Hz)

4-[2-(4-(4-Dimethylsulfamoyl-1-piperazinyl)phenyl]-2-oxoethylthio]quinoline (Compound 84)

MS m/z: 470 (M⁺); NMR(CDCl₃) δ: 2.87(6H, s), 3.35-3.50(8H, m), 4.48(2H, s), 6.91(2H, d, J=8.9 Hz), 7.31(1H, d, J=5.0 Hz), 7.55(1H, ddd, J=1.3, 6.9, 8.2 Hz), 7.72(1H, ddd, J=1.3, 6.9, 8.6 Hz), 7.97(2H, d, J=9.2 Hz), 8.07(1H, d, J=7.9 Hz), 8.17(1H, dd, J=1.0, 8.6 Hz), 8.71(1H, d, J=5.0 Hz)

4-[2-[4-[4-(N-tert-Butylcarbamoyl)-1-piperazinyl]phenyl]-2-oxoethylthio]quinoline (Compound 85)

MS m/z: 462 (M⁺); NMR(CDCl₃) δ: 1.38(9H, s), 3.40-3.56(8H, m), 4.47(2H, s), 6.86(2H, d, J=8.9 Hz), 7.30(1H, d, J=4.6 Hz), 7.55(1H, ddd, J=1.3, 6.9, 8.3 Hz), 7.72(1H, ddd, J=1.3, 6.9, 8.3 Hz), 7.96(2H, d, J=8.9 Hz), 8.07(1H, d, J=8.3 Hz), 8.17(1H, dd, J=1.0, 8.3 Hz), 8.71(1H, d, J=4.6 Hz)

4-[2-[4-(4-Methanesulfonyl-1-piperazinyl)phenyl]-2-oxoethylthio]quinoline (Compound 86)

MS m/z:441 (M⁺); NMR(CDCl₃) δ: 2.83(3H, s), 3.39(4H, t, J=5.0 Hz), 3.51(4H, t, J=5.3 Hz), 4.47(2H, s), 6.92(2H, d, J=8.9 Hz), 7.31(1H, d, J=4.6 Hz), 7.55(1H, ddd, J=1.3, 6.9, 8.2 Hz), 7.72(1H, ddd, J=1.3, 6.9, 8.3 Hz), 7.97(2H, d, J=8.9 Hz), 8.07(1H, d, J=8.3 Hz), 8.16(1H, dd, J=1.0, 8.6 Hz), 8.71(1H, d, J=4.6 Hz)

Example 6

4-[2-[2-Methoxy-4-hexyloxyphenyl]-2-oxoethylthio]-quinoline (Compound 55)

4-[2-(4-Hydroxy-2-methoxyphenyl)-2-oxoethylthio]-quinoline (Compound 12; 83 mg, 0.25 mmol) and potassium carbonate(42 mg, 0.25 mmol) were suspended in dry DMF (2.0 ml). Hexylbromide (0.041 ml, 0.28 mmol) was addded at -15° C. to the suspension and stirred at room temperature overnight. The reaction mixture was added with water under ice cooling, extracted with ethyl acetate, washed with saturated saline solution and dried over anhydrous magnesium sulfate. The solvent was removed under reduced pressure. The residue was chromatographed by silica gel chromatography (n-hexane:ethyl acetate=1:4) to obtain 82.1 mg of the titled compound (80.3%).

Melting Point: 88.5-89.5° C.; MS m/z: 409 (M⁺); NMR(CDCl₃) δ: 0.91(3H, t, J=6.9 Hz), 1.3-1.55(6H, m), 1.80(2H, quint, J=6.9 Hz), 3.99(3H, s), 4.02(2H, t, J=6.6 Hz), 4.58(2H, s), 6.50(1H, d, J=2.3 Hz), 6.56(1H, dd, J=2.1, 8.9 Hz), 7.33(1H, d, J=5.0 Hz), 7.58(1H, brt, J=7.6 Hz), 7.75(1H, brt, J=7.6 Hz), 7.91(1H, d, J=8.6 Hz), 8.20(2H, m), 8.68(1H, d, J=5.3 Hz)

In accordance with the procedure of the Example 6, the following compounds were obtained from corresponding starting materials.

4-[2-[4-(4-Methoxybenzyloxy)phenyl]-2-oxoethylthio]-quinoline (Compound 56)

MS m/z: 415 (M⁺); NMR(CDCl₃) δ: 3.83(3H, s), 4.50(2H, s), 5.08(2H, s), 6.93(2H, d, J=8.9 Hz), 7.04(2H, d, J=8.9 Hz), 7.30(1H, d, J=5.0 Hz), 7.36(2H, d, J=8.6 Hz), 7.56(1H, ddd, J=1.3, 6.9, 8.2 Hz), 7.72(1H, ddd, J=1.3, 6.9, 8.3 Hz), 8.02(2H, d, J=8.9 Hz), 8.07(1H, brd, J=8.9 Hz), 8.17(1H, dd, J=0.8, 8.6 Hz), 8.72(1H, d, J=5.0 Hz)

4-[2-[3-Methoxy-4-(2,3-epoxypropoxy)phenyl]-2-oxoethylthio]quinoline (Compound 57)

MS m/z: 381 (M⁺); NMR(CDCl₃) δ: 2.79(1H, dd, J=2.6, 5.0 Hz), 2.94(1H, t, J=4.6 Hz), 3.41(1H, m), 3.93(3H, s), 4.11(1H, dd, J=5.6, 11.6 Hz), 4.40(1H, dd, J=3.0, 11.6 Hz), 4.53(2H, s), 7.00(1H, d, J=8.3 Hz), 7.34(1H, d, J=5.0 Hz), 7.55-7.62(2H, m), 7.65(1H, dd, J=2.2, 8.3 Hz), 7.75(1H, ddd, J=1.3, 6.9, 8.3 Hz), 8.17(2H, brt, J=8.9 Hz), 8.72(1H, d, J=5.0 Hz)

4-[2-[3-Methoxy-4-(4-methoxybenzyloxy)phenyl]-2-oxoethylthio]quinoline (Compound 58)

MS m/z: 445 (M⁺); NMR(CDCl₃) δ: 3.81(3H, s), 3.93(3H, s), 4.52(2H, s), 5.18(2H, s), 6.91(2H, d, J=8.6 Hz), 6.96(1H, d, J=8.6 Hz), 7.34(1H, d, J=5.0 Hz), 7.37(2H, d, J=8.9 Hz), 5.57(1H, d, J=2.0 Hz), 7.61(2H, d, J=8.2 Hz), 7.76(1H, brt, J=7.0 Hz), 8.19(2H, m), 8.71(1H, d, J=5.0 Hz)

4-[2-[4-(5-Ethoxycarbonyl-n-pentyloxy)phenyl]-2-oxoethylthio]quinoline (Compound 59)

MS m/z: 437 (M⁺); NMR(CDCl₃) δ: 1.26(3H, t, J=7.3 Hz), 1.5-1.9(6H, m), 2.34(2H, t, J=7.3 Hz), 4.05(2H, t, J=7.3 Hz), 4.13(2H, q, J=7.3 Hz), 4.50(2H, s), 6.95(2H, m), 7.30(1H, d, J=4.6 Hz), 7.56(1H, m), 7.72(1H, m), 8.07(1H, dd, J=0.7, 8.6 Hz), 8.17(1H, dd, J=1.0, 8.6 Hz), 8.72(1H, d, J=4.6 Hz)

Example 7

4-[2-[3-Methoxy-4-(2,3-dihydroxypropoxy)phenyl]-2-oxoethylthio]quinoline (Compound 60)

4-[2-[3-Methoxy-4-(2,3-epoxypropoxy)phenyl]-2-oxoethylthio]quinoline (Compound 57; 2.0 g, 5.25 mmol) was added at 0° C. to the mixture of formic acid (40 ml) and water (4 ml), and stirred at room temperature overnight. The solvent was removed under reduced pressure. The residue was added with an ice-cooled aqueous solution of 40% sodium hydroxide (7.0 ml) and stirred at 0° C. for 30 minutes. The solvent was removed under reduced pressure and the residue was chromatographed by silica gel column chromatography (dichloromethane:methanol=20:1) to obtain 1.4 g of the titled compound (67.0%). Melting Point: 177° C. (decomp.)

MS m/z: 399 (M⁺); NMR(CD₃ OD-CDCl₃) δ: 3.74(2H, dd, J=1.7, 4.6 Hz), 3.95(3H, s), 4.12(2H, br.quint, J=6.6 Hz), 4.20(1H, quint, J=6.1 Hz), 4.76(2H, s), 7.07(1H, d, J=8.6 Hz), 7.48(1H, d, J=5.3 Hz), 7.61(1H, d, J=2.0 Hz), 7.68(1H, ddd, J=1.3, 6.9, 8.2 Hz), 7.75-7.9(2H, m), 8.04(1H, brd, J=8.6 Hz), 8.27(1H, dd, J=0.7, 8.6 Hz), 8.65(1H, d, J=5.2 Hz)

Example 8

4-[2-(2-Naphtyl)-2-hydroxyethylthio]quinoline (Compound 61)

4-[2-(2-Naphtyl)-2-oxoethylthio]quinoline (Compound 2; 450 mg, 1.37 mmol) was dissolved in ethanol (50 ml), added at -15° C. with sodium borohydride (70 mg, 3.04 mmol), and stirred at -15° C. for two hours. The reaction mixture was added with water and neutralized by 2N hydrochloric acid. The solvent was removed under reduced pressure. The residue was extracted with ethyl acetate, washed with saturated saline solution and dried over anhydrous magnesium sulfate. The solvent was removed under reduced pressure and the residue was chromatographed by silica gel column chromatography (hexane:ethyl acetate=1:4) to obtain 165.7 mg of the titled compound (36.5%).

Melting Point: 170.5-172.5° C. MS m/z: 331 (M⁺); NMR(CDCl₃) δ: 3.59(2H, t, J=6.9 Hz), 5.20(1H, dd, J=5.6, 6.9 Hz), 7.38(1H, d, J=5.0 Hz), 7.45-7.55(2H, m), 7.60(1H, ddd, J=1.3, 5.0, 6.9 Hz), 7.77(1H, ddd, J=1.3, 7.0, 8.3 Hz), 7.8-7.9(5H, m), 8.03(1H, d, J=8.6 Hz), 8.19(1H, brd, J=7.8 Hz), 8.60(1H, d, J=5.0 Hz),

4-[2-[4-(4-tert-Butoxycarbonyl-1-piperazinyl)phenyl]-2-hydroxyethylthio]quinoline (Compound 87)

MS m/z: 465 (M⁺); NMR(CDCl₃) δ: 1.49(9H, s), 2.50(1H, brs), 3.15(4H, t, J=5.1 Hz), 3.44(2H, brd, J=6.4 Hz), 3.58(4H, t, J=5.1 Hz), 4.94(1H, brt, J=6.3 Hz), 6.93(2H, d, J=8.6 Hz), 7.26(1H, d, J=4.6 Hz), 7.34(2H, d, J=8.6 Hz), 7.56(1H, ddd, J=1.3, 6.9, 8.2 Hz), 7.73(1H, ddd, J=1.3, 6.6, 8.3 Hz), 8.07(1H, d, J=8.3 Hz), 8.17(1H, dd, J=1.1, 8.3 Hz), 8.71(1H, d, J=5.0 Hz)

Example 9

4-[4-[Bis(2-hydroxyethyl)amino]benzylthio]-7-methylthioquinoline (Compound 62)

4-[4-[Bis(2-acetoxyethyl)amino]benzylthio]-7-methylthioquinoline (Compound 47; 30 mg, 0.06 mmol) was dissolved in methanol (5 ml) and added with potassium carbonate (34 mg, 0.247 mmol) and stirred at room temperatue for two hours. Methanol was removed under reduced pressure. The reaction mixture was added with water and extracted twice with chloroform. The combined chloroform layers were washed with saturated saline solution. The solvent was removed under reduced pressure and the residue was washed with ethyl acetate to obtain 20 mg of the titled compound (81%).

Melting Point: 162-165° C.; MS m/z: 400 (M⁺); NMR(CDCl₃) δ: 2.60(3H, s), 3.60(4H, m), 3.87(4H, m), 4.25(2H, s), 6.67(2H, d, J=8.6 Hz), 7.17(1H, d, J=4.6 Hz), 7.28(2H, d, J=8.6 Hz), 7.36(1H, dd, J=2.0, 8.9 Hz), 7.74(1H, d, J=2.0 Hz), 7.96(1H, d, J=8.9 Hz), 8.62(1H, d, J=4.6 Hz)

CAPABILITY OF EXPLOITATION IN INDUSTRY

The compounds of the present invention can be applied as selective antibacterial agent against Hp for the treatment of peptic ulcer and chronic gastritis with Hp infection. 

We claim:
 1. A quinoline sulfide compound, represented by the formula I or pharmaceutically acceptable salts thereof: ##STR6## wherein R₁ represents hydrogen or halogen atom, C₁ -C₆ alkoxy, C₁ -C₆ alkylthio or di C₁ -C₆ alkylamino; R₂ and R₃ respectively represent hydrogen atom or C₁ -C₆ alkyl; one of R₄ and R₅ represents hydroxyl group and the other represents hydrogen atom or CR₄ R₅ represents carbonyl;m and n are integers, m being 1 or 2, n being 0 or 1; wherein when n is 0, Ar represents a group of the formula II or III ##STR7## wherein R₆ represents hydrogen atom, C₁ -C₆ alkyl or di C₁ -C₆ alkylamino; R₇ represents hydrogen atom, C₁ -C₉ alkyl, hydroxy C₁ -C₆ alkyl, napthoyl C₁ -C₆ alkyl, acetoxy C₁ -C₆ alkyl, C₁ -C₆ alkoxycarbonyl, trihalo C₁ -C₆ alkoxycarbonyl, di C₁ -C₆ alkylaminoacetyl or di C₁ -C₆ alkylamino C₁ -C₆ alkyl; R₈ represents hydrogen atom, C₁ -C₆ alkyl, hydroxy C₁ -C₆ alkyl or acetoxy C₁ -C₆ alkyl, or NR₇ R₈ represents pyrrolidinyl, piperidino, morpholino or piperazinyl (which may be substituted by C₁ -C₆ alkyl or formyl); R₉ represents benzyl; and t is an integer and is 0 or 1; and wherein when n is 1, Ar represents naphthyl, fluorenyl or a group of the formula IV, V or VI ##STR8## wherein R₁₀ represents hydrogen atom, C₁ -C₆ alkyl, hydroxyl group, C₁ -C₆ alkoxy, epoxy C₁ -C₆ alkoxy, mono- or dihydroxy C₁ -C₆ alkoxy, phenyl, piperidinyl (which may be substituted by C₁ -C₆ alkylcarbonyl or C₁ -C₆ alkoxycarbonyl), or tetrahydropyridyl (which may be substituted by C₁ -C₆ alkylcarbonyl); R₁₁ represents hydrogen atom, C₁ -C₆ alkoxy or benzyloxy; R₁₂ represents hydrogen atom or C₁ -C₆ alkoxy; R₁₃ represents hydrogen atom or C₁ -C₆ alkoxy; R₁₄ represents C₁ -C₆ alkoxycarbonyl, phenyl (which may be substituted by C₁ -C₆ alkoxy), or benzoyl (which may be substituted by C₁ -C₆ alkyl); R₁₅ represents hydrogen or halogen atom; R₁₆ represents hydrogen atom, C₁ -C₆ alkyl, C₁ -C₆ alkylcarbonyl, C₁ -C₆ alkoxycarbonyl, or pyrrolidinyl (which may be substituted by C₁ -C₆ alkoxycarbonyl); R₁₇ represents hydrogen atom, C₁ -C₉ alkyl or benzyl, or NR₁₆ R₁₇ represents piperidino, morpholino, piperazinyl (which may be substituted by C₁ -C₆ alkyl, C₁ -C₆ alkylcarbonyl, C₁ -C₆ alkoxycarbonyl, trihalo C₁ -C₆ alkoxycarbonyl, C₂ -C₆ alkenyloxycarbonyl, phenoxycarbonyl, benzyloxycarbonyl, amino C₁ -C₆ alkylcarbonyl (amino group may be substituted by C₁ -C₆ alkoxycarbonyl), cinnamoyl (which may be substituted by C₁ -C₆ alkoxy), C₁ -C₆ alkylcarbamoyl, di C₁ -C₆ alkylsulfamoyl, C₁ -C₆ alkylsulfonyl, di C₁ -C₆ alkylaminothiocarbonyl, pyrimidyl or phenyl (which may be substituted by halogen atom)), imidazolidinyl (which may be substituted by oxo or C₁ -C₆ alkyl) or homopipermzinyl (which may be substituted by C₁ -C₆ alkoxycarbonyl); p is an integer within a range of 0-5 and r is an integer within a range of 0-2; with the proviso that when m and n are both 1, CR₄ R₅ is carbonyl, and Ar is the group of the formula IV, then R₁, R₂, R₃, R₁₀, R₁₁ and R₁₁ are not hydrogen atoms; and with the proviso that when m is 1, n is 0, and Ar is 4-aminophenyl, then R₁ is not hydrogen, halogen atom or C₁ -C₆ alkoxy.
 2. The compound according to claim 1 wherein m and n are both
 1. 3. The compound according to claim 1 wherein m and n are both 1 and CR₄ R₅ is carbonyl.
 4. The compound according to claim 1 wherein m and n are both 1, CR₄ R₅ is carbonyl, and R₁, R₂ and R₃ are hydrogen atoms.
 5. The compound according to claim 1 wherein m and n are both 1, CR₄ R₅ is carbonyl, R₁, R₂ and R₃ are hydrogen atoms, and Ar is a group of the formula VI.
 6. A pharmaceutical composition, comprising the compound as claimed in claim 1 and a pharmaceutically acceptable diluent or carrier.
 7. The compound according to claim 1, wherein m and n are both 1, r is 0, CR₄ R₅ is carbonyl, R₁, R₂ and R₃ are hydrogen atoms, Ar is a group of the formula VI, and NR₁₆ R₁₇ is piperazinyl which may be substituted by a substituent selected from the group consisting of C₁ -C₆ alkyl, C₁ -C₆ alkylcarbonyl, C₁ -C₆ alkoxycarbonyl, trihalo C₁ -C₆ alkoxycarbonyl, C₂ -C₆ alkenyloxycarbonyl, phenoxycarbonyl, benzyloxycarbonyl, amino C₁ -C₆ alkylcarbonyl, cinnamoyl, C₁ -C₆ alkylcarbamoyl, di C₁ -C₆ alkylsulfamoyl, C₁ -C₆ alkylsulfonyl, di C₁ -C₆ alkylaminothiocarbonyl, pyrimidyl and phenyl;wherein the amino group in the amino C₁ -C₆ alkylcarbonyl substituent may be substituted by C₁ -C₆ alkoxycarbonyl; wherein the cinnamoyl substituent may be substituted by C₁ -C₆ alkoxy; and wherein the phenyl substituent may be substituted by halogen.
 8. The compound according to claim 1, wherein r is 0, and NR₁₆ R₁₇ is piperazinyl which may be substituted by a substituent selected from the group consisting of C₁ -C₆ alkyl, C₁ -C₆ alkylcarbonyl, C₁ -C₆ alkoxycarbonyl, trihalo C₁ -C₆ alkoxycarbonyl, C₂ -C₆ alkenyloxycarbonyl, phenoxycarbonyl, benzyloxycarbonyl, amino C₁ -C₆ alkylcarbonyl, cinnamoyl, C₁ -C₆ alkylcarbamoyl, di C₁ -C₆ alkylsulfamoyl, C₁ -C₆ alkylsulfonyl, di C₁ -C₆ alkylaminothiocarbonyl, pyrimidyl and phenyl;wherein the amino group in the amino C₁ -C₆ alkylcarbonyl substituent may be substituted by C₁ -C₆ alkoxycarbonyl; wherein the cinnamoyl substituent may be substituted by C₁ -C₆ alkoxy; and wherein the phenyl substituent may be substituted by halogen. 